io.github.stevemilton/payagent-mcp
NPM · @ARISPAY/PAYAGENT-MCP
Pay x402 APIs in USDC on Base, Solana, and BNB Chain with spend mandates, receipts, idempotency.
Available components
Last scanned (50 minutes ago)
Scores higher than 61% of npm servers
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security81
- No malware found by supply-chain analysis.Pass
- CVE check failed: a known high-severity CVE affects zod 3.25.76, a direct dependency. A fixed version is available. View diagnostics → Fail
- No install/post-install scripts declared.Pass
- 32 of 104 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 20 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability76
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 921 tokens (~153/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage94
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 81% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +1
- Stability: 0.97 → pass security
- 3 Nov 26 −1
- Stability: pass → 0.97 functional
- 28 Oct 26 +1
- Stability: 0.97 → pass security
- 27 Oct 26 −1
- Stability: pass → 0.97 functional
- 25 Oct 26 0
- Package version: 3.1.2 → 4.0.0 functional
- 24 Oct 26 −5
- CVE-2023-54404 affects this package: high ▼ security
- Known CVEs: pass → fail ▼ security
- 21 Oct 26 +1
- Stability: 0.97 → pass security
- 20 Oct 26 −1
- Stability: pass → 0.97 functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Analysed npm/@arispay/payagent-mcp@4.0.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Vulnerabilities 1 finding
| ID | CVE | Severity | Vector | Fix available |
|---|---|---|---|---|
| GHSA-mrhx-c7xc-m3w5 | CVE-2023-54404 | high | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | yes |
Background: What a vulnerability scan can and cannot prove →
Dependencies 104 packages
| Packages resolved | 104 |
|---|---|
| Stale | 32 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
balance ~111
Read-only: shows the active payment identity — the stored ArisPay agent (delegated) or the PAYAGENT_PRIVATE_KEY-derived address (self-custody) — with its USDC deposit address, on-chain balance, and (delegated) spend-mandate limits. Spends no money, never pays. Select this to find where to send USDC, to confirm a deposit landed, or when a payment fails.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | Optional name of a locally-stored x402 agent. |
No output schema declared.
No examples provided.
discover ~172
Searches the ArisPay marketplace for paid APIs by capability or plain-language intent, optionally budget-bounded (integer cents). Read-only — spends no money, needs no API key. Returns ranked candidates with endpoint URL, price in cents, health and verification flags. Select this to FIND an endpoint; then inspect to price a specific URL, then pay to call it.
| Name | Type | Req | Description |
|---|---|---|---|
| budgetCentsMax | integer | – | Maximum acceptable price in INTEGER CENTS (500 = $5.00). Free listings always pass. |
| category | string | – | Optional category filter (inference, data, media, search, social, infrastructure, trading, other). |
| limit | integer | – | Max results (default 5, max 20). |
| query | string | yes | Capability or plain-language intent, e.g. 'flight search'. |
No output schema declared.
No examples provided.
history ~102
Read-only: lists recent payments — the server-side activity feed in delegated mode (newest first), or locally recorded receipts in self-custody mode. Spends no money. Select this to reconcile what was paid, retrieve a past receipt, or audit an agent's spending.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | Optional stored agent name — limits the feed to that wallet (delegated mode). |
| limit | integer | – | Max entries (default 10, max 50). |
No output schema declared.
No examples provided.
inspect ~87
Fetches an x402-protected URL WITHOUT paying and reports its price, asset, network, and payment requirements. Read-only — spends no money, sends no payment header, needs no API key or account. Always safe. Select this before pay to know exactly what a resource costs.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | The URL to inspect. Expected to return HTTP 402 with an x402 challenge. |
No output schema declared.
No examples provided.
pay ~291
SPENDS REAL MONEY — on-chain and irreversible. The complete machine payment path: makes the HTTP request, and if the server answers 402, selects the supported asset/network variant (USDC on Base/Ethereum/Polygon; delegated mode also settles Solana and BNB Chain variants), validates policy, pays, retries the request, and returns the response plus a structured machine-readable receipt. Requires an idempotencyKey: re-calling with a key that already paid returns the cached receipt and does NOT pay again. Mode selection: PAYAGENT_PRIVATE_KEY set → signs locally (self-custody; wallet balance is the only cap); otherwise pays through the stored ArisPay agent whose per-tx/daily/monthly mandate is enforced server-side BEFORE signing. Use inspect first to see the price. Do not use for ordinary unpaid HTTP requests.
| Name | Type | Req | Description |
|---|---|---|---|
| agent | string | – | Optional name of a stored x402 payer agent (delegated mode). |
| body | string | – | – |
| headers | object | – | – |
| idempotencyKey | string | yes | Caller-chosen unique key for this payment intent (min 8 chars, e.g. a UUID). Re-calling with a key that already paid returns the cached receipt WITHOUT paying again. Use a fresh key for each new paym… |
| method | string | – | – |
| url | string | yes | The full URL of the API endpoint to call. |
No output schema declared.
No examples provided.
setup ~158
Creates or recovers an ArisPay account for delegated custody and provisions a USDC payer wallet in one call (side effects: registers the email, creates a Coinbase CDP-managed wallet, writes credentials to ~/.payagent/config.json on this machine). Moves no money — it does NOT spend funds. Idempotent: re-running with the same email recovers the existing account and its wallets. Not needed in self-custody mode: if PAYAGENT_PRIVATE_KEY is set, skip setup entirely — pay works with the local key alone.
| Name | Type | Req | Description |
|---|---|---|---|
| string | yes | Email to register the account under. It is also the recovery key — use a real address. | |
| name | string | – | Human name. Falls back to the email local-part. |
No output schema declared.
No examples provided.
How do I install the io.github.stevemilton/payagent-mcp server?
io.github.stevemilton/payagent-mcp runs locally as an npm package, launched with npx -y @arispay/payagent-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @arispay/payagent-mcp
claude mcp add stevemilton-payagent-mcp -- npx -y @arispay/payagent-mcp
What is the io.github.stevemilton/payagent-mcp server?
io.github.stevemilton/payagent-mcp is listed in the public MCP registry as io.github.stevemilton/payagent-mcp. Pay x402 APIs in USDC on Base, Solana, and BNB Chain with spend mandates, receipts, idempotency. This page covers its npm package (@arispay/payagent-mcp).
Is the io.github.stevemilton/payagent-mcp server safe to use?
io.github.stevemilton/payagent-mcp scores 79 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 5 November 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the io.github.stevemilton/payagent-mcp server expose?
io.github.stevemilton/payagent-mcp exposes 6 tools: setup, discover, inspect, pay, balance, history. Their descriptions and schemas cost roughly 921 tokens of context every time the server is loaded.
Is the io.github.stevemilton/payagent-mcp server still maintained?
io.github.stevemilton/payagent-mcp is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the io.github.stevemilton/payagent-mcp server under?
io.github.stevemilton/payagent-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.