Validate Formhaus form definitions and simulate multi-step paths against the real engine.
Nothing to run from here
Q402 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.
97/100
trust score
44
downloads a day
local
runs on your machine
2k
downloads in 30d
What it does
MCP server for Q402. Gasless USDC/USDT/RLUSD/Q payments on 12 EVM chains (USDG on Robinhood Chain), Q402 Yield (gasless supply and withdraw into Aave, Lista, and Morpho lending vaults), gasless non-custodial escrow (create, fund, release, refund, dispute)
Quickstart
# 1 — add it to Claude Code
claude mcp add --scope user q402-mcp '--' npx -y @quackai/q402-mcp
# 2 — ask your agent for something these tools do
# q402_quote, q402_batch_pay, q402_balance and 45 more
Q402 costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Publishernot claimed
QUAll 1 server
@quackai1 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. This one runs on your machine: your client starts Q402 as a process under your own user, with your files and your network, so the tool surface below is what it can do to your computer rather than to a server somewhere else. Its scan result is on the Security tab — read the surface before you approve it.
Claude Codedeclared by this listing
This is a public server: you run it yourself and this marketplace is not in the path. You need Node.js — the current LTS (24) is the safe choice; npx comes with it. Claude Code registers it in one command; --scope user makes it available in every project. The '--' is in quotes so that PowerShell passes it on.
claude mcp add --scope user q402-mcp '--' npx -y @quackai/q402-mcpReconnect, or start a new session, and the tools appear in the model’s tool list.
Free on mcprush, and it runs from its publisher’s own package: this marketplace is not in the path, so there is no key of ours to hold and no card to add.
What it asks of you
Nothing is required, but it can take Q402_TRIAL_API_KEY (Recommended path: skip this UI and run `q402_doctor` after install - it stores secrets in ~/.q402/mcp.env, which the server auto-loads. Fill this field directly), Q402_MULTICHAIN_API_KEY (Recommended path: skip this UI and run `q402_doctor` after install - it stores secrets in ~/.q402/mcp.env, which the server auto-loads. Fill this field directly), Q402_PRIVATE_KEY (Mode A - real EOA signing. Hex-encoded EVM private key (0x + 64 hex chars) of YOUR MetaMask wallet, used to sign payment authorizations LOCALLY on your machine.), Q402_AGENTIC_PRIVATE_KEY (Mode B - local Agent Wallet signing. Hex-encoded EVM private key (0x + 64 hex chars) exported from your Agent Wallet at https://q402.quackai.ai/dashboard -> Age), Q402_ENABLE_REAL_PAYMENTS (Live-mode switch. 0 = sandbox (test mode, no funds move - every q402_pay returns a fake hash). 1 = real on-chain payments. Default 1 since v0.5.11: safe because), Q402_MAX_AMOUNT_PER_CALL (Per-call USD-equivalent cap for USDC/USDT/RLUSD. Any such q402_pay request with amount above this is rejected before signing. Q (QuackAI) is exempt by design (y), Q402_ALLOWED_RECIPIENTS (Optional comma-separated lowercase EVM addresses. When set, q402_pay rejects any recipient not on this allowlist.), Q402_RELAY_BASE_URL (Override for the Q402 relay endpoint. Defaults to https://q402.quackai.ai/api. Set explicitly when running against a self-hosted Q402 deployment or a non-canoni), Q402_AGENT_WALLET_ADDRESS (Server-managed Agent Wallet picker (walletMode='agentic-server' only). Lowercased agent wallet address (the hex 0x... shown on the Agent tab of your dashboard)), Q402_API_KEY (DEPRECATED legacy single-key env from pre-v0.5.0 installs. The server still reads it as a silent fallback so existing setups keep working, but new users should), Q402_WALLET_ID (DEPRECATED soft-migration alias for Q402_AGENT_WALLET_ADDRESS (one release of overlap from v0.6.0). The server still accepts it but logs a deprecation notice. N), Q402_BUILDER_CODE (Optional Base Builder Code for onchain attribution (ERC-8021 / Base Builder Codes). When set, every q402_x402_fetch payment includes your code as the client/int) if you want to set them.
What it writes
One config entry your client uses to start the process locally. A local server runs with your file system and your network, which is why it is priced without metering.
What you approve
48 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.
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Free
$0 forever
- Every tool, no call limit
- No card, and mcprush charges nothing for it
- Source published under Apache-2.0
- Runs on your machine — nothing of it reaches our gateway
- 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 Q402 or to call it, at any volume.
Call allowance · this installenforced at the gateway
Monthly allowance, in calls
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Alert at 80% · then the tool returns a normal MCP error
Used this month: —
ATrust score 97 / 100
Release 0.11.32 · scanned 15 Oct 2026
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.
Threat score100
Client score97
Findings1 threat · 2 capability
Capabilitymoderate
Coveragesource
Verificationsource
Surface digest69bdf5bba1b4cffa883cc16357a0997015e3b02f5c8569a3a05d47c8c241f5ec
Score vectorthreat 100 → client 97
| Term | Level | What it prices | Points |
|---|---|---|---|
| capability-exposure | moderate | capability blast radius (moderate) — client exposure if the model is manipulated | −3 |
| verification-discount | source | publisher verification (provenance) — cryptographic build provenance ties the artifact to its source | −0 |
| coverage-honesty | source | inspection depth (source) — how much of the target the scan could see | −0 |
score = clamp(round(threatScore − E_cap − E_ver − E_cov), 0, 100). No model, no opinion, no network call at scoring time: the same methodology version against the same bytes always produces this number, and every line above is a field of the report rather than a summary of it.
What the scan could actually read
A grade is only as meaningful as its coverage, so the scanner publishes its own depth before it publishes its result.
Tool surfaceread
Implementation sourceread
Package metadataread
Live transportnot available
Tools were statically extracted from the published source (48 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".
Capability — what it could do if the model were manipulated
Tags derived from each tool’s schema and the implementation, not from what the tool calls itself. moderate is the level these add up to.
| Tool | Capability tags | Why the tag was assigned |
|---|---|---|
| q402_quote | no tags | |
| q402_batch_pay | no tags | |
| q402_balance | no tags | |
| q402_receipt | no tags | |
| q402_wallet_status | no tags | |
| q402_clear_delegation | no tags | |
| q402_doctor | no tags | |
| q402_agentic_info | no tags | |
| q402_bridge_quote | no tags | |
| q402_bridge_send | no tags | |
| q402_oft_quote | no tags | |
| q402_oft_send | no tags | |
| q402_oft_history | no tags | |
| q402_bridge_history | no tags | |
| q402_bridge_gas_tank | no tags | |
| q402_yield_reserves | no tags | |
| q402_yield_positions | no tags | |
| q402_yield_deposit | no tags | |
| q402_yield_withdraw | no tags | |
| q402_stake_positions | no tags | |
| q402_stake | no tags | |
| q402_unstake | no tags | |
| q402_recurring_list | no tags | |
| q402_memory_summary | no tags | |
| q402_vendor_history | no tags | |
| q402_agent_spend_report | no tags | |
| q402_recurring_create | external-sink | external-sink: parameter "recipient" |
| q402_recurring_cancel | no tags | |
| q402_recurring_fires | no tags | |
| q402_recurring_pause | no tags | |
| q402_recurring_resume | no tags | |
| q402_recurring_skip_next | no tags | |
| q402_request_create | external-sink | external-sink: parameter "recipient" |
| q402_request_status | no tags | |
| q402_request_pay | no tags | |
| q402_escrow_create | no tags | |
| q402_escrow_status | no tags | |
| q402_escrow_lock | no tags | |
| q402_escrow_release | no tags | |
| q402_escrow_refund | no tags | |
| q402_escrow_dispute | no tags | |
| q402_redstone_feeds | no tags | |
| q402_redstone_trigger_create | external-sink | external-sink: parameter "recipient" |
| q402_redstone_trigger_list | no tags | |
| q402_redstone_trigger_cancel | no tags | |
| q402_governance_analyze | no tags | |
| q402_x402_fetch | untrusted-input | untrusted-input: keyword "fetch" |
| q402_pay | no tags |
Toxic-flow graph
The lethal trifecta, checked as a graph rather than as a checklist: untrusted input, a sensitive source and an external sink have to meet before there is a path worth worrying about.
flow-1
Untrusted input can drive an external action even though no sensitive source is exposed.
Supply chain and provenance
Integrityfirst-seen
Surface digest69bdf5bba1b4cffa
Scanned2026-10-15
This is the first scan of this surface here, so there is nothing yet to compare it against.
Every result on this tab comes from one deterministic pass over the published package — offline, rule by rule, and auditable line by line above. Same methodology version, same bytes, same score.
Release history
Always latest — the install command names no version, so it installs the newest release when it runs; the current release on file is 0.11.32. Pin a release below and the command asks for exactly that one.
0.11.32
21 Sep 2026
latestNo release note was published with this version.
0.11.30
18 Sep 2026
No release note was published with this version.
0.11.27
10 Sep 2026
No release note was published with this version.
0.11.25
4 Sep 2026
No release note was published with this version.
0.11.24
undated
- The version this listing was on when mcprush began following its releases. The registry was not asked when it shipped, so this row carries no date.
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Who can review
One review per account, from a signed-in account that does not publish this listing. Nothing else is asked — you can say what you think before you install it. Publishers can reply once per review, and a review can be edited or deleted by whoever wrote it.
Sign in to write one
Any signed-in account that does not publish Q402 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.