The trust layer for
x402 agent payments

AI agents pay for APIs autonomously over x402 — but a large share of listed endpoints are dead, and even a live one is not always something you can buy. Payments are irreversible. PulseFeed verifies an endpoint before your agent pays it.

84% of the services catalogs call "healthy" actually work. We independently audit the rest.
See the live x402 audit → How it works
1667live services audited
17286payable endpoints
19%dead or invalid

What you get

Trust & safety oracle free

Before paying an unknown x402 endpoint: liveness, uptime/reputation, a scam & anomaly scan (payTo hijack, price bait-and-switch, honeypot, non-USDC asset), on-chain receiver profile, and a pay/avoid verdict.

GET /trust?endpoint=… · free /verify

Payment guard SDK npm

Drop-in wrapper for your agent's payment fetch. Every payment is verified first; dead/scam endpoints are blocked automatically. Zero dependencies.

npm i pulsefeed-x402-guard

MCP server npm

Give Claude Desktop / Cursor / Cline tools to find live x402 services and verify endpoints before paying.

npx -y pulsefeed-x402-mcp

Agent-framework tools npm

Drop-in tools for the Vercel AI SDK and LangChain: verify an x402 endpoint before your agent pays, and discover working services.

npm i pulsefeed-x402-ai-tools

On-chain intelligence $0.01+

Real-time Base signals for agents: token pulse, whale alerts, smart-money accumulation/distribution, momentum.

/pulse · /whales · /flow · /momentum

For AI agents — verify before you pay

// drop-in guard around your x402 payment fetch
import { guardFetch } from "pulsefeed-x402-guard";
const safe = guardFetch(payingFetch);
await safe("https://some-x402-service/api"); // verified, then paid — or blocked

Or one call: GET https://www.pulsefeed.dev/verify?endpoint=<url> (free) · GET https://www.pulsefeed.dev/trust?endpoint=<url> (live, free).

Pricing — all data is free since 2026-09-02; only token signals are pay-per-call (x402 · USDC on Base)

EndpointWhatPrice
/verifyCached trust verdictfree
/trustLive verification + scam scan + on-chainfree
/trust/historyEndpoint track record over timefree
/trust/datasetBulk trust dataset (all services, one call)free
/mcp/drift/historyFull MCP supply-chain drift series since 2026-07-30free
/data/fullCross-domain dataset (x402 + MCP + incidents)free
/pulse · /momentumToken activity / momentum$0.01
/whales · /flowWhale alerts / smart-money flow$0.02

PulseFeed — independent trust & safety layer for the x402 agent economy.
Research: frozen dataset with recount scripts — doi:10.5281/zenodo.22270727 (CC BY 4.0) · daily manifests signed (Ed25519) and Bitcoin-timestamped — /anchors/latest.json · verdict freshness published in /status.json.
Contact: contact page · nikolife2016@gmail.com · GitHub · security.txt
Observatory · Changes · State of x402 · Trust Score · Embed widget · Methodology · OpenAPI · llms.txt · manifest · guard SDK · MCP · AI SDK tools