Polymarket and Predict.fun historical tick data, plus backtest quotes and status, over MCP
Nothing to run from here
AgentTax 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
6
downloads a day
local
runs on your machine
650
downloads in 30d
What it does
US sales/use tax, nexus thresholds, capital gains and 1099-DA tools for AI agent transactions.
Quickstart
# 1 — add it to Claude Code
claude mcp add --scope user agenttax-mcp '--' npx -y @agenttax/mcp-server
# 2 — ask your agent for something these tools do
# calculate_tax, track_payment, ingest_transactions and 12 more
AgentTax costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Publishernot claimed
AGAll 1 server
AgentTax1 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 AgentTax 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 agenttax-mcp '--' npx -y @agenttax/mcp-serverReconnect, 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 AGENTTAX_API_KEY (AgentTax API key (free tier at agenttax.io). Optional: without it the server runs in demo mode, 50 calls/day.) if you want to set it.
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
15 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.
Calculate US sales tax (seller) or use tax (buyer) for an AI agent transaction. Returns tax amount, rate, jurisdiction,
No parameter schema on file.
Track a payment you received and calculate your sales tax liability. Call this after receiving any payment — Stripe, x402, or direct.
No parameter schema on file.
Bulk-log up to 100 transactions (e.g. purchases from third-party x402 sellers) into your AgentTax history in one call.
No parameter schema on file.
List your logged transactions with a running summary (seller/buyer counts, total taxable, total tax). Requires API key.
No parameter schema on file.
Log a buy or sell trade for capital gains tracking. Sell trades return realized gain/loss with cost basis, holding period,
No parameter schema on file.
List trades you have logged, with realized gains on sells. Requires API key.
No parameter schema on file.
Export a DRAFT IRS Form 1099-DA payload for realized digital-asset gains from your logged trades: payer and recipient blocks,
No parameter schema on file.
Get US state sales tax rates with digital-goods taxability, SaaS notes, and verification metadata, for all 51 jurisdictions or one state. No API key needed.
No parameter schema on file.
Get the combined state + local sales tax rate for a US zip code, with the breakdown and self-administered locality flags (e.g. Colorado home-rule cities). No API key needed.
No parameter schema on file.
Get state capital gains rates (short and long term) with federal context and per-state caveats, for all states or one. No API key needed.
No parameter schema on file.
Get each state's economic nexus threshold (revenue and transaction count), whether it has sales tax, marketplace-facilitator and
No parameter schema on file.
List the states where you have told AgentTax you have nexus, with each state's rate and how nexus monitoring measures thresholds. Requires API key.
No parameter schema on file.
Set which US states you have economic nexus in. Sellers must configure nexus to get non-zero sales tax results.
No parameter schema on file.
Get AgentTax's machine-readable pricing contract: tiers, call limits, and the x402 per-call price. No API key needed.
No parameter schema on file.
Check AgentTax API health, available endpoints, pricing tiers, and registry validation status.
No parameter schema on file.
Free
$0 forever
- Every tool, no call limit
- No card, and mcprush charges nothing for it
- Source published under MIT
- 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 AgentTax 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: —
ATrust score 97 / 100
Release 1.2.0 · 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
Findings0 threat · 1 capability
Capabilitymoderate
Coveragesource
Verificationsource
Surface digest616944f3b1877452ed8315c2482b24c0514ec9aeb24b99c78be4c51010316ca6
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 (15 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 |
|---|---|---|
| calculate_tax | no tags | |
| track_payment | external-sink | external-sink: declares readOnlyHint: false, openWorldHint: true |
| ingest_transactions | external-sink | external-sink: declares readOnlyHint: false, openWorldHint: true |
| list_transactions | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| log_trade | external-sink | external-sink: declares readOnlyHint: false, openWorldHint: true |
| list_trades | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| export_1099_da | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| get_rates | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| get_local_rate | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| get_capital_gains_rates | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| get_nexus_thresholds | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| get_nexus | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| configure_nexus | external-sink | external-sink: declares readOnlyHint: false, openWorldHint: true |
| get_pricing | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
| check_health | untrusted-input | untrusted-input: declares openWorldHint: true (interacts with entities outside the server) |
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 digest616944f3b1877452
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 1.2.0. Pin a release below and the command asks for exactly that one.
1.2.0
14 Oct 2026
latestNo release note was published with this version.
1.1.1
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.
—
no reviews yet
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 AgentTax can review it, once — before installing it or after. A review from an account that has installed it is marked as one.
No reviews yet
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.