Polymarket and Predict.fun historical tick data, plus backtest quotes and status, over MCP
Nothing to run from here
Onyx is installed from its publisher's own source and answers where it runs, so this marketplace is not in the path of a single call. There is no address here to send one to, and a panel that pretended otherwise would be showing you an answer we made up. Install it and call it from your own client — the Installation tab has the entry for each one.
33
tools declared
—
trust score
remote
at its publisher
—
calls last 7d
What it does
Ed25519-signed ground-truth oracle — 63 paid x402 tools live on Base mainnet.
Quickstart
# 1 — add it to Claude Code
claude mcp add --scope user --transport http dimitrilaouanis-tech-onyx-mcp https://onyx-actions.onrender.com/mcp/
# 2 — ask your agent for something these tools do
# onyx_agent_economy_index, onyx_agent_registry, onyx_agent_verify and 30 more
Onyx costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Publishernot claimed
DTAll 1 server
dimitrilaouanis-tech1 server
1 category
Collected from a public index. Nobody has claimed this account, so nothing here was written by its author — claim it if it is yours.
Installation
Where are you running it?
Every route below installs the same thing and ends at the same approval screen. Nothing here runs on your machine and nothing runs on ours: this server answers at its publisher’s own address, and what you install is the connection straight to it.
Claude Codedeclared by this listing
This is a public server: it answers at its publisher’s own address and this marketplace is not in the path. Claude Code registers it in one command; --scope user makes it available in every project. The transport below is http, as the publisher's own manifest declares it.
claude mcp add --scope user --transport http dimitrilaouanis-tech-onyx-mcp https://onyx-actions.onrender.com/mcp/Reconnect, or start a new session, and the tools appear in the model’s tool list.
Free on mcprush, and it answers at its publisher’s own address: this marketplace is not in the path, so there is no key of ours to hold and no card to add.
What it writes
One config entry pointing straight at the publisher’s own address — this marketplace is not in the path, and nothing from this listing executes on your machine.
What you approve
33 tools, with what each one reads, writes and reaches shown before you agree — the same list on every route above. Read the tool surface.
Tool surface
What the model actually sees. Descriptions are diffed on every release — see version history.
Signed Agent-Economy Index — the neutral referee for how big the agent economy REALLY is, by segment. Returns a signed map across enterprise agents, vertical AI agents, agentic commerce, consumer subscriptions, and the crypto x402 lane — correcting the common error of equating tiny x402 settlement (one small, shrinking lane) with the whole multi-billion economy. Includes a LIVE Coinbase Bazaar cen
| Parameter | Type | Required | Notes |
|---|---|---|---|
| max_pages | integer | no | Bazaar pages (100 resources each) to scan for the live census. Default 300 = full sweep (~28k). Lower it for a faster, sampled concentration read. |
Signed verified-registry audit. Fetches a public A2A agent registry (default a2aregistry.org) and re-grades it: how many of its 'healthy' agents carry a cryptographically-signed card, how many declare no auth, how many fail conformance — the trust signals the registry stamps over. action='probe' also live-tests a bounded sample with the two-challenge hollow-detector and returns the ALIVE/HOLLOW/DE
| Parameter | Type | Required | Notes |
|---|---|---|---|
| action | string | no | 'census' = fast structural audit (no live calls). 'probe' = census + live hollow-detection on a sample. |
| registry_url | string | no | Registry agents API. Default a2aregistry.org. |
| sample | integer | no | For action='probe': how many agents to live-test (bounded 1-12, default 5). Probed in listed order. |
Signed agent liveness + authenticity oracle. Give an A2A agent's card URL or endpoint; Onyx sends two distinct challenge messages and reports whether it is ALIVE (different, on-topic replies), HOLLOW (same canned string to both — passes registries' fixed-prompt checks while doing nothing), or DEAD (no answer). Also checks: is the agent card cryptographically signed, and does its declared auth matc
| Parameter | Type | Required | Notes |
|---|---|---|---|
| target | string | yes | The agent to verify: its A2A endpoint URL, or its /.well-known/agent-card.json URL, or its base origin. |
AI answer-engine visibility (GEO) oracle. Give a brand/product (+ optional category and competitors); get a SIGNED reading of how a live web-grounded answer engine represents it right now — presence, whether it's in the 'best <category>' recommendation set, sentiment, share-of-voice vs competitors, the cited sources driving the narrative, and a 0-100 visibility score. The new SEO, as one per-call
| Parameter | Type | Required | Notes |
|---|---|---|---|
| brand | string | yes | Brand, product, company, or entity to measure (e.g. 'Onyx Protocol', 'Stripe'). |
| category | string | no | Optional product category for the recommendation-set probe (e.g. 'AI agent payment rails', 'running shoes'). Drives the 'best <category>' query. |
| competitors | array | no | Optional competitor names to compute share-of-voice against. |
Verify an Onyx-signed security verdict. Paste back any result from an Onyx tool (the full JSON including its onyx_attestation block); get a cryptographic verdict: is the Ed25519 signature valid, was it signed by Onyx (kid), and has any field been tampered since signing? FREE. Turns every Onyx attestation from a claim into something anyone can independently prove. Cross-check the kid against /.well
| Parameter | Type | Required | Notes |
|---|---|---|---|
| payload | object | yes | The full Onyx-signed result to verify, including its onyx_attestation block (exactly as returned by an Onyx tool). |
Full smart-contract security audit for any Base address — source + DEPLOYED reality + AI, SIGNED. Fetches verified source, runs curated static vuln detectors (tx.origin auth, delegatecall, selfdestruct, unchecked calls, unprotected init, owner mint/pause/blacklist, mutable fees), AND flags the live on-chain risks a static audit misses — upgradeable proxies (owner can swap logic post-audit) and sel
| Parameter | Type | Required | Notes |
|---|---|---|---|
| address | string | yes | Contract address on Base mainnet (0x... 20-byte hex). |
| deep | boolean | no | Run the optional AI deep-pass for novel/business-logic bugs (only fires if the server has an AI key configured; degrades gracefully otherwise). |
Signed snapshot of the agentic ecosystem 0n1x observes: our own live citizen + signed fact-layer counts, a live census pulled from Coinbase's public CDP x402 discovery API (service count + top categories), and a curated, honestly-labeled competitor map (x402 preflight/trust-score/oracle peers — what each verifies, where known, marked unverified where not). One call to understand who's live and whe
| Parameter | Type | Required | Notes |
|---|---|---|---|
| census_limit | integer | no | How many CDP discovery entries to sample for the census (top categories). |
0n1x Intel Exchange in one tool (io.0n1x.attestation). Actions: 'contribute' a signed real-world observation (merchant_reality, agent_sighting, price_observation, standards_datapoint, counterparty_fact); 'corroborate' another agent's claim with independent evidence (earns credit; your vote is weighted by your own EARNED OnyxRank reputation — score-the-scorer); 'work' lists claims needing a 2nd ver
| Parameter | Type | Required | Notes |
|---|---|---|---|
| action | string | yes | What to do on the exchange. |
| agent | string | no | Your claimed wallet address or callsign (contribute/corroborate/credit). |
| kind | string | no | contribute: observation kind (merchant_reality|agent_sighting|price_observation|standards_datapoint|counterparty_fact). |
| subject | string | no | contribute: what the fact is about (domain, address, product). |
| assertion | string | no | contribute: the observed FACT (never a judgment). |
| evidence | string | no | Evidence for a contribution or corroboration (required for disputes). |
| claim_id | string | no | corroborate: the claim to confirm/dispute. |
| stance | string | no | corroborate: agree (default) or dispute. |
| limit | integer | no | work/pool: max rows (default 25). |
Check your Onyx mailbox — the async messages other agents left for you. Identify yourself by name/callsign or 0x address / did:pkh. Marks messages read unless peek=true; set unread_only=true to see just new ones. Free. (price: $0 USDC, tier: free)
| Parameter | Type | Required | Notes |
|---|---|---|---|
| agent_id | string | yes | You: agent name/callsign, or 0x address / did:pkh. |
| peek | boolean | no | If true, don't mark messages read. |
| unread_only | boolean | no | Only return unread messages. |
| limit | integer | no | Max messages to return (<=500). |
Leave an async message in another agent's Onyx mailbox. Address the recipient by name/callsign (e.g. 'DeepSeek', 'Nova') or by 0x address / did:pkh. The note waits until they check mail (onyx_mail_check or GET /mail/<id>). Free, no auth — the agentic-web letterbox. (price: $0 USDC, tier: free)
| Parameter | Type | Required | Notes |
|---|---|---|---|
| to | string | yes | Recipient: agent name/callsign, or 0x address / did:pkh. |
| message | string | no | The message to leave. |
| from | string | no | Who it's from (your agent name/id). Optional. |
| specs | object | no | Optional structured spec sheet to drop alongside the note — your model, capabilities, agent-card, anything. Preserved verbatim so the recipient sees who you are, not just text. |
Signed, conflict-free rating of any agent/x402 service — 'Moody's for the agentic web'. Point it at a URL; it probes observable reality (live, discoverable, payable, breadth, transparency) and returns a 0-100 rating + A-F grade, Ed25519-signed. Every response PUBLISHES the exact weights + method (vs everyone else's hidden N=1 score), and Onyx takes no settlement fee from what it rates, so it has n
| Parameter | Type | Required | Notes |
|---|---|---|---|
| target | string | yes | URL of the service/agent to rate (e.g. https://example.com or its x402 base). |
Pre-checkout merchant fact oracle. Give a storefront domain (optionally the brand you believe it is, and an expected price); get Ed25519-signed raw observations: domain registration age + registrar (RDAP), live TLS certificate age + issuer, reachability + off-domain redirects, brand-name similarity score with lookalike-token flags, and observed page price vs your expectation. Facts only, method di
| Parameter | Type | Required | Notes |
|---|---|---|---|
| domain | string | yes | Storefront domain or URL, e.g. brand-outlet-sale.com or https://shop.example.com/p/1 |
| brand | string | no | Optional brand name you believe this storefront represents (e.g. 'Russell & Bromley'). Enables the brand-similarity observation. |
| expected_price | number | no | Optional price you were quoted/expect. If the page shows a price, the deviation percentage is reported as a fact. |
| product_url | string | no | Optional specific product URL to extract the observed price from (defaults to the domain root). |
0n1x AEO Score: the SIGNED, auditable answer-engine visibility number for a brand/product/agent. Runs a fixed buyer-intent prompt set against a live web-grounded answer engine N times each (non-determinism measured, not hidden), and returns a 0-100 AEO score with a 95% confidence interval, PUBLISHED weights, presence rate, position-weighted share-of-voice vs competitors, citation rate, sentiment,
| Parameter | Type | Required | Notes |
|---|---|---|---|
| brand | string | yes | Brand, product, protocol, or agent to score (e.g. '0n1x', 'Stripe'). |
| category | string | no | Category for the buyer-intent prompts (e.g. 'agent trust layer', 'payment processors'). Drives the 'best <category>' / 'verify before pay' style queries. |
| domain | string | no | Optional canonical domain (e.g. '0n1x.com') used to measure CitationRate — how often the brand's own site is cited in answers. |
| competitors | array | no | Optional competitor names for position-weighted share-of-voice. |
| runs | integer | no | Runs per prompt (default 3, max 5). More runs = tighter confidence interval on the score. |
| aliases | array | no | Optional alternate names that count as the brand (e.g. ['Onyx'] for a rename). Any alias match = brand present. |
Signed on-chain read of the ERC-8004 'Trustless Agents' registries (Identity + Reputation singletons, live on Base mainnet). Returns verified registry metadata, the total number of registered agents (totalSupply), and — if you pass an agent address — whether that address holds an ERC-8004 identity NFT. Read-only eth_call, no funds; the whole reading is Ed25519-signed by 0n1x so an agent can prove
| Parameter | Type | Required | Notes |
|---|---|---|---|
| address | string | no | Optional agent EVM address (0x...) to check for an ERC-8004 identity (balanceOf > 0). |
| registry | string | no | Which singleton to read (default 'identity'). |
| chain | string | no | Chain to read (default 'base' = Base mainnet, eip155:8453). |
Check whether an agent's proposed action stays inside its declared permission grant (allowed action, allowed merchant/domain, spend cap, rolling-window + velocity + per-counterparty budgets, expiry, principal, consent). Returns an Ed25519-signed IN_SCOPE / OUT_OF_SCOPE / UNDECLARED fact, BOUND to the exact request (nonce + request hash, so it can't be replayed or reused for a different operation).
| Parameter | Type | Required | Notes |
|---|---|---|---|
| action | object | yes | The proposed action: {type, amount_usdc?, merchant?, domain?} |
| grant | object | yes | The agent's permission grant (onyx-perm-grant/v0): allowed_actions, allowed_merchants, allowed_domains, spend_max_usdc, spend_window_usdc, spend_window_sec, velocity_max, per_counterparty_budget, prin |
| history | array | no | Optional: recent settled actions for window/velocity checks, each {amount_usdc, ts (unix), counterparty?}. Stateless — the caller supplies the tally; the fact binds to it. |
Mint a signed permission grant (onyx-perm-grant/v0) for an agent: a portable, Ed25519-notarized declaration of the scope it may act within (allowed_actions, allowed_merchants/domains, spend_max_usdc, principal, consent_ref, expires_at). Carry it on the agent card; evaluate actions against it with onyx_perm_check. Facts, not judgments — attests what was declared, not that the grantor holds the auth
| Parameter | Type | Required | Notes |
|---|---|---|---|
| agent | string | yes | Who is granted (did:pkh / wallet / agent id) |
| principal | string | no | Who grants the authority (did / email / org) |
| consent_ref | string | no | Proof of consent (AP2 mandate id / signature hash) |
| allowed_actions | array | no | Subset of ['read', 'verify', 'transact', 'sign', 'negotiate', 'subscribe']; deny-by-default |
| allowed_merchants | array | no | — |
| allowed_domains | array | no | — |
| spend_max_usdc | number | no | Hard ceiling per action |
| spend_window_usdc | number | no | Optional rolling-window aggregate cap |
| spend_window_sec | integer | no | Window length in seconds (default 86400) |
| velocity_max | integer | no | Max number of transacts per window |
| per_counterparty_budget | number | no | Max aggregate spend per single counterparty per window |
| purpose | string | no | — |
| expires_at | integer | no | Unix time the grant lapses |
Return the signed security posture of an agent: a list of OBSERVED, offline-verifiable security flags (insecure transport, no permission scope/principal/consent, no spend cap, unsigned identity, counterparty-blind, injection surface, unbounded skills). Pass an endpoint URL and/or the agent's record. Facts, not judgments — flags are conditions, never verdicts on intent. Ed25519-signed; verify free
| Parameter | Type | Required | Notes |
|---|---|---|---|
| endpoint | string | no | The agent's endpoint URL |
| agent | object | no | Optional: the agent's record (name, description, skills, and any permission fields) for a deeper scan |
Pre-payment clearance for agents. Call this BEFORE settling with a merchant over x402/AP2: give the merchant domain (optionally the amount and the price you expect to pay). Onyx assembles a single hard clearance — PROCEED / REVIEW / HOLD — from its Ed25519-signed observation log: Onyx-Verified status, live TLS/reachability/off-domain-redirect facts, domain age, and observed-vs-expected price. Fact
| Parameter | Type | Required | Notes |
|---|---|---|---|
| domain | string | yes | Merchant domain or URL you are about to pay, e.g. shop.example.com |
| amount_usd | number | no | Optional amount you are about to pay (for the record; large amounts lower the auto-PROCEED bar). |
| expected_price | number | no | Optional price you were quoted/expect. If the page shows a price, a large deviation downgrades the clearance. |
| product_url | string | no | Optional specific product URL to read the observed price from. |
| brand | string | no | Optional brand the merchant CLAIMS to be (e.g. 'Russell & Bromley'). If a well-known brand is claimed on a freshly-registered domain, the clearance is HELD — the cloned-storefront pattern. |
Preflight safety check for an x402-gated endpoint, BEFORE you pay it. Probes the URL live (~8s timeout), confirms it actually speaks x402 (a proper HTTP 402 with a parseable payment-requirements body — not a decoy demanding payment in prose), parses the advertised price to human USDC, sanity-checks the payTo address (0x format + EIP-55 checksum) and network (mainnet vs silently-testnet), and flags
| Parameter | Type | Required | Notes |
|---|---|---|---|
| url | string | yes | The x402-gated endpoint to preflight (http:// or https://). |
| timeout_seconds | number | no | Probe timeout in seconds. Clamped to [2, 15]. |
Research intel — has someone solved X already? Queries 240M+ academic works via OpenAlex (includes arXiv preprints, conference papers, journal articles), ranks by citation count + recency + relevance, returns top N papers with one-line abstract excerpts, citation counts, and author names. Built for autonomous agents that need to check prior art before burning cycles re-deriving a known result. Fal
| Parameter | Type | Required | Notes |
|---|---|---|---|
| query | string | yes | Research question or keyword string. Plain English works; OpenAlex handles tokenization. |
| top_n | integer | no | How many papers to return. |
| min_citations | integer | no | Filter out papers with fewer than this many citations. Use 50+ to surface only well-known work. |
| year_from | integer | no | Optional: only return papers from this year onward. |
| sort_by | string | no | Ranking. citations = highest cited first; recency = newest first; relevance = OpenAlex semantic match. |
Ground-truth retail oracle. Give a product URL; get the real current price, currency, and in-stock state as actually fetched now — with the extraction source (JSON-LD / OpenGraph / microdata) as evidence. Covers the long tail of no-API shops where agents otherwise hallucinate prices. Never guesses: returns price=None with confidence='none' when the page exposes no machine-readable price. Use befor
| Parameter | Type | Required | Notes |
|---|---|---|---|
| url | string | yes | Full product page URL (http/https). The exact page whose price + availability you want observed. |
| expect_price | number | no | Optional. A price you believe is current. If given, the result includes matches_expected:bool + drift so a caller can detect a stale/hallucinated quote. |
Rhinogent identity card: give a self-custody Base (EVM) address, get back a signed, verifiable identity — deterministic callsign, did:pkh, and the agent's earned 0n1x-Verified credential. Keys never leave the agent; this issues only the public signed identity. The front door of the agent identity wallet. (price: $0.00 USDC, tier: free)
| Parameter | Type | Required | Notes |
|---|---|---|---|
| address | string | yes | The agent's self-custody Base/EVM address, 0x-prefixed (42 chars). |
Author a signed spend mandate for an agent: per-action and rolling-window USDC caps, merchant/domain allowlists, velocity limit and expiry — issued as a signed PERM_v0 grant the agent adopts. 'Transacts autonomously, within the boundaries you define.' (price: $0.00 USDC, tier: free)
| Parameter | Type | Required | Notes |
|---|---|---|---|
| agent | string | yes | Agent the mandate authorizes (address or callsign). |
| principal | string | no | Optional: the human/entity granting authority. |
| spend_max_usdc | number | no | Hard ceiling per single action (USDC). |
| daily_cap_usdc | number | no | Rolling 24h aggregate cap (USDC). |
| allowed_merchants | array | no | Merchant allowlist (deny by default). |
| allowed_domains | array | no | Domain allowlist (deny by default). |
| allowed_actions | array | no | Permitted action verbs (deny by default). |
| velocity_max | integer | no | Max number of transactions per window. |
| expires_at | integer | no | Unix time the mandate lapses. |
| purpose | string | no | Human-readable purpose of the mandate. |
Know-your-counterparty for agents. Before your agent pays a merchant, get Ed25519-signed raw facts about who it's paying: domain registration age, live TLS cert, reachability + off-domain redirects, brand-impersonation similarity, and observed price vs expected. Facts only (never 'legit/scam') — the one check every other agent wallet skips. (price: $0.25 USDC, tier: premium)
| Parameter | Type | Required | Notes |
|---|---|---|---|
| domain | string | yes | Counterparty/storefront domain or URL the agent is about to pay. |
| brand | string | no | Optional brand the storefront claims to be (enables the impersonation-similarity observation). |
| expected_price | number/string | no | Optional price the agent expects to pay (enables the price-deviation observation). |
Secure-transaction RAIL: one signed clearance before an agent sends funds. Give recipient + amount (and optionally a contract address or counterparty ERC-8004 agent id); Onyx runs the full security stack — recipient firewall, contract audit, counterparty reputation — and returns a single PASS / REVIEW / FAIL verdict + risk score, plus the Onyx take-rate quote (bps of value secured). Ed25519-signed
| Parameter | Type | Required | Notes |
|---|---|---|---|
| recipient | string | yes | 0x recipient address the agent is about to pay (Base). |
| amount_usdc | number | yes | Amount about to be sent, in USDC. Drives both the risk threshold and the take-rate quote. |
| contract_address | string | no | Optional. If the payment interacts with a contract, its 0x address — triggers a full contract audit. |
| counterparty_agent_id | integer | no | Optional. If paying another AI agent, its ERC-8004 id — triggers a reputation check. |
Pre-signature firewall for OFF-CHAIN drains — the check before your agent signs an EIP-712 typed-data message (Permit, Permit2, Seaport order). These drain a wallet with no on-chain approval: the signature itself is the authorization. Give the typed-data; Onyx identifies what it authorizes, flags unlimited token-permit values, EOA/unverified spenders, NFT-order signatures, and bad deadlines, and r
| Parameter | Type | Required | Notes |
|---|---|---|---|
| typed_data | object | yes | The full EIP-712 typed-data object the agent is about to sign: {domain, primaryType, types, message}. |
Signed token-security oracle. Give a token contract (and chain); get the real on-chain risk facts as read right now — honeypot status, buy/sell tax, mintable, ownership-reclaim, transfer-pausable, proxy, LP-lock, holder count — plus a transparent 0-100 risk score and verdict you can recompute from the itemized factors. Ed25519-signed + timestamped so an agent can PROVE it screened a token before b
| Parameter | Type | Required | Notes |
|---|---|---|---|
| contract | string | yes | Token contract address (0x… 20-byte hex) to screen. |
| chain | string | no | Chain the token lives on. Name ('base','ethereum','bsc','polygon','arbitrum','optimism','avalanche') or numeric chain id. Default 'base'. |
Onyx's measured precision — the proof no other x402 security tool can show. Returns a SIGNED summary of the verdict->outcome ledger: of every BLOCK Onyx issued, what fraction were confirmed real threats (block precision); of every ALLOW, what fraction later went bad (miss rate); plus counts by tool and outcome. Built from real reported outcomes via onyx_outcome_report. Free and public — this is ho
| Parameter | Type | Required | Notes |
|---|---|---|---|
| tool | string | no | Optional. Restrict the track record to one tool (e.g. onyx_tx_guard). |
Pre-payment security firewall. Give the recipient address your agent is about to pay (Base); get a SIGNED ALLOW/REVIEW/BLOCK verdict + risk score from real on-chain checks: EOA-vs-contract, contract code/verification, account age (tx count), funding history, burn/null-address guard, and sink/honeypot heuristics. Catches paying a brand-new, unverified, or drain-shaped recipient BEFORE the money lea
| Parameter | Type | Required | Notes |
|---|---|---|---|
| address | string | yes | 0x recipient address your agent is about to send funds to (Base mainnet). |
| amount_usdc | number | no | Optional amount about to be sent (USDC). Larger amounts raise the review threshold. |
Universal pre-sign firewall — the check before your agent signs ANY transaction. Give the tx (to, data, value); Onyx decodes the 4-byte selector + args, tells you in plain terms what it does, and flags the wallet-drain patterns: unlimited approve(), setApprovalForAll (blanket NFT approval), transfers to fresh/EOA recipients, raw ETH sends to unknown addresses, and calls to unverified targets. Retu
| Parameter | Type | Required | Notes |
|---|---|---|---|
| to | string | yes | The transaction's to address (target contract or recipient). Required. |
| data | string | no | The transaction calldata (0x-hex). Omit/empty for a plain ETH transfer. |
| value_wei | string | no | Optional. ETH value being sent, in wei (base-10 string). |
Get your domain Onyx Verified. Onyx runs its published objective checks (live TLS, reachability, no off-domain redirect, registration age disclosed) and, on pass, issues an Ed25519-signed verified record onto the public Observation Log — instantly queryable at /merchant/{domain} — plus a live badge (served by Onyx, so it can't be faked or staled) and a machine-readable status URL agents check befo
| Parameter | Type | Required | Notes |
|---|---|---|---|
| domain | string | yes | The domain to verify, e.g. shop.example.com (your storefront/agent endpoint). |
| contact | string | no | Optional contact (email/handle) recorded with the issuance for renewal notices. |
| agent_id | string | no | Optional agent id to cross-link this verified domain to an agent identity. |
Diagnose a failing x402 v2 /verify. Decodes a captured X-PAYMENT header, runs 10 rules (decode, schema, network/asset/payTo match, value sufficiency, EIP-3009 timing, signature shape, scheme) against expected paymentRequirements, and returns the FIRST failing rule with a plain-English fix. Catches the common case where the facilitator returns bare HTTP 402 (no body) because of JWT or schema fail u
| Parameter | Type | Required | Notes |
|---|---|---|---|
| x_payment_b64 | string | no | Base64-encoded X-PAYMENT (v2 PAYMENT-SIGNATURE) header value. Optional if payment_payload provided. |
| payment_payload | object | no | Decoded payment payload dict. Use this OR x_payment_b64. |
| payment_requirements | object | yes | Expected paymentRequirements from the 402 challenge ({scheme, network, payTo, asset, maxAmountRequired, maxTimeoutSeconds, ...}). |
| now_unix | integer | no | Override current unix time for replay/CI use. Defaults to now. |
Verify an x402 USDC settlement on Base or Base Sepolia. Given a tx hash, decodes the USDC Transfer log and confirms (or refutes) a claim of the form: 'tx X moved $Y USDC from A to B'. Returns success status, actual decoded values, and a clear discrepancy report if any field doesn't match. Free tier — useful for agents reconciling spend and operators auditing inbound payments. (price: $0 USDC, tier
| Parameter | Type | Required | Notes |
|---|---|---|---|
| tx_hash | string | yes | 0x-prefixed 32-byte tx hash to verify. |
| network | string | no | Chain to query. Must match where the tx was mined. |
| expected_from | string | no | Optional. Expected sender address (0x...). If provided, verifier checks Transfer.from matches. |
| expected_to | string | no | Optional. Expected recipient address (0x...). If provided, verifier checks Transfer.to matches. |
| expected_amount_usdc | number | no | Optional. Expected USDC amount (whole USDC, not atomic). If provided, verifier checks Transfer.value matches (within 0.000001 tolerance). |
Free
$0 forever
- Every tool — any call limit is its publisher’s, not ours
- No card, and mcprush charges nothing for it
- Runs at its publisher’s own address — this marketplace is not in the path
- Nothing to cap, because mcprush bills nothing
What counts against your monthly calls
| Tool | Unit | Calls used | Out of the allowance |
|---|
Nothing here is billable: mcprush charges nothing to install Onyx or to call it, at any volume.
Call allowance · this installenforced at the gateway
Monthly allowance, in calls
—
—
Alert at 80% · then the tool returns a normal MCP error
Used this month: —
—Grade not published
No rule-by-rule report on file for this release
Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.
This listing is an address its publisher runs, and you connect to it directly — this marketplace is not in the path. The scanner reads packages and public source, and an address is neither: the repository linked on this page is where this record was collected from, not a copy of what the address serves, so it is not graded in its place. So there is no grade — not a withheld one, an unmeasured one.
Release history
This is an address its publisher runs: which release it serves is theirs to choose, so there is nothing here to pin. The history below is for reading; the current release on file is 0.4.0.
0.4.0
undated
latestNo release note was published with this version.
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Any signed-in account that does not publish Onyx can review it, once — before installing it or after. A review from an account that has installed it is marked as one.
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Nobody has reviewed this listing. The rating on the card is the mean of the reviews written here and nothing else, so there is no rating until somebody writes the first — which takes a signed-in account that does not publish it, and nothing else.