pulsefeed.dev
Independent trust & safety oracle for the x402 agent-payment economy. Verify an endpoint before your AI agent pays it — liveness, scam detection, on-chain receiver checks. Plus real-time Base on-chain intelligence. Pay-per-call via x402.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"docs": {
"llms": "https://pulsefeed.dev/llms.txt",
"site": "https://pulsefeed.dev/data",
"openapi": "https://pulsefeed.dev/openapi.json"
},
"error": "X-PAYMENT header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x7f5f784Ba98cEcFC0bA4336f0E48222A3d4d69a8",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://pulsefeed.dev/lab/e1",
"description": "Insertion-path positive control for a measurement experiment (x402-foundation/x402#3045): does a v1-envelope settlement still create a catalog row at the current epoch? Returns a static acknowledgement.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"discoverable": true
}
},
"maxAmountRequired": "11000",
"maxTimeoutSeconds": 60
}
],
"quickstart": {
"curl": "curl https://pulsefeed.dev/lab/e1 # returns this 402 challenge; retry with an X-PAYMENT header built by any x402 client",
"node": "import { wrapFetchWithPayment } from \"x402-fetch\"; const payingFetch = wrapFetchWithPayment(fetch, account); const r = await payingFetch(\"https://pulsefeed.dev/lab/e1\"); // account = viem account with USDC on Base",
"guard": "npm i pulsefeed-x402-guard # optional: verify endpoints before paying",
"install": "npm i x402-fetch viem"
},
"x402Version": 1
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.011 USDC on Base to 0x7f5f…d69a8. The signed payment is good for 1 minute.
- Paid to
- 0x7f5f…d69a8
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 11000 smallest units
- Buys
- Insertion-path positive control for a measurement experiment (x402-foundation/x402#3045): does a v1-envelope settlement still create a catalog row at the current epoch? Returns a static acknowledgement.
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x7f5f784Ba98cEcFC0bA4336f0E48222A3d4d69a8",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://pulsefeed.dev/lab/e1",
"description": "Insertion-path positive control for a measurement experiment (x402-foundation/x402#3045): does a v1-envelope settlement still create a catalog row at the current epoch? Returns a static acknowledgement.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"discoverable": true
}
},
"maxAmountRequired": "11000",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-21 08:20Z
- Last indexed by Roundhouse
- 2026-09-20 08:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 11:15Z
- x402 version
- 1
- Max timeout
- 60s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 28 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service pulsefeed.dev and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=pulsefeed.dev' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://pulsefeed.dev/lab/e1, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.