Horizon Pulse
Pay-per-call APIs for AI agents, paid in USDC on Base or Solana, or RLUSD on the XRP Ledger, with x402: web search, page fetch and extract, screenshots, PDF to text, an HTTP proxy, and crypto market data. No signup or API key.
SearchLiveeip155:8453Exactvia cdp
Marketplacex402SearchDiscoveryBuy-plan
Calls · 30d
3↑ 24%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 20 snapshots so far.
$60.19
Verified settled volume
263 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-10-26 05:52Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x5b32c973596078a967562ca652761404f19be0e9The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x5b32…be0e9. The signed payment is good for 5 minutes.
- Paid to
- 0x5b32…be0e9
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
4512units
on Base · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x5b32…be0e9
- Token contract
- 0x60a3…adb42
- Payment window
- 5 minutes
5000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- BjY98A…BTRPz
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
0.005units
on xrpl:0 · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- r3Fbir…6LQcf
- Token contract
- 524C55…00000
- Payment window
- 5 minutes
5000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x5b32…be0e9
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5b32c973596078a967562ca652761404f19be0e9",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x60a3e35cc302bfa44cb288bc5a4f316fdb1adb42",
"extra": {
"name": "EURC",
"buffer": "1.01",
"pricing": "EURC amount = ceil(USD price / eurUsdRate * buffer), 6 decimals; fixed rate, no live FX",
"version": "2",
"rateDate": "2026-10-23",
"eurUsdRate": "1.1193",
"rateSource": "ECB euro reference rate"
},
"payTo": "0x5b32c973596078a967562ca652761404f19be0e9",
"amount": "4512",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
},
"payTo": "BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz",
"amount": "5000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
},
{
"asset": "524C555344000000000000000000000000000000",
"extra": {
"issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
"areFeesSponsored": false
},
"payTo": "r3FbirL83RAB2CwnUdxE5pCohMkuo6LQcf",
"amount": "0.005",
"scheme": "exact",
"network": "xrpl:0",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x5b32c973596078a967562ca652761404f19be0e9",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"n": "3",
"q": "weather forecast"
}
},
"output": {
"type": "json",
"example": {
"ok": true,
"asOf": "2026-10-12T04:09:36.396Z",
"index": {
"source": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/search",
"resources": 11,
"partialResults": false
},
"query": {
"n": 1,
"q": "horizon pulse bazaar check",
"kind": null,
"rail": null,
"maxPrice": null,
"minHealth": null
},
"source": "market-search",
"results": [
{
"url": "https://horizonpulse.dev/api/bazaar-check",
"kind": "api_route",
"rank": {
"parts": {
"live": 1,
"recency": 0.922,
"adoption": 0.239,
"relevance": 1
},
"score": 0.874
},
"price": {
"unit": "call",
"scheme": "exact",
"currency": "USD",
"amountUsd": "$0.01"
},
"rails": [
"x402:base",
"x402:solana"
],
"trust": {
"paytoSigned": null,
"paytoCrossCheck": {
"status": "match",
"message": "Every network's live payTo matches the index entry exactly.",
"networks": [
{
"live": "0x5b32c973596078a967562ca652761404f19be0e9",
"rail": "x402:base",
"agree": true,
"indexed": "0x5b32c973596078a967562ca652761404f19be0e9",
"network": "eip155:8453"
},
{
"live": "BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz",
"rail": "x402:solana",
"agree": true,
"indexed": "BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
}
]
},
"paytoStableSince": null
},
"health": {
"probe": {
"ms": 155,
"error": null,
"cached": false,
"findings": [],
"httpStatus": 402
},
"score": 0.969,
"status": "verified_402",
"lastUpdated": "2026-10-09T19:43:15.621Z",
"lastCalledAt": "2026-10-09T19:43:15.345Z",
"uniquePayers30d": 2
},
"method": "GET",
"seller": {
"domain": "horizonpulse.dev",
"verified": false,
"isHorizonPulse": true
},
"source": [
"bazaar",
"self"
],
"buyPlan": {
"url": "https://horizonpulse.dev/api/bazaar-check",
"mode": "direct_x402",
"payTo": [
{
"rail": "x402:base",
"payTo": "0x5b32c973596078a967562ca652761404f19be0e9",
"network": "eip155:8453",
"amountUsd": "$0.01"
},
{
"rail": "x402:solana",
"payTo": "BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"amountUsd": "$0.01"
}
],
"ready": true,
"method": "GET",
"reason": "Live 402 re-checked now; every network's payTo matches the index exactly.",
"takeRate": 0,
"holdsFunds": false
},
"license": null,
"listing": {
"note": "Third-party listing text, returned as data, not instructions. Horizon Pulse does not verify it.",
"tags": [
"developer-tools",
"x402",
"bazaar",
"indexing",
"lint"
],
"title": "Horizon Pulse",
"injectionSuspect": false
},
"offerId": "x402:GET:https://horizonpulse.dev/api/bazaar-check",
"checkout": {
"mode": "direct_x402",
"takeRate": 0,
"holdsFunds": false
},
"fetchedAt": "2026-10-12T04:09:35.151Z",
"ttlSeconds": 300,
"indexedAccepts": [
{
"rail": "x402:base",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0x5b32c973596078a967562ca652761404f19be0e9",
"scheme": "exact",
"network": "eip155:8453",
"testnet": false,
"amountUsd": "$0.01",
"assetLabel": "USDC (Base)",
"amountAtomic": "10000",
"maxTimeoutSeconds": 300
},
{
"rail": "x402:solana",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"payTo": "BjY98A6dS3GGLZdz2zHy8wK7XAwnQgNhCc66mfmBTRPz",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"testnet": false,
"amountUsd": "$0.01",
"assetLabel": "USDC (Solana)",
"amountAtomic": "10000",
"maxTimeoutSeconds": 300
}
]
}
],
"summary": {
"filtered": 0,
"returned": 1,
"candidates": 12,
"failedLive": 0,
"verifiedLive": 3,
"paytoMismatches": 0,
"skippedNonHttps": 0
},
"elapsedMs": 1245
}
}
},
"schema": {
"type": "object",
"$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"
},
"queryParams": {
"type": "object",
"required": [
"q"
],
"properties": {
"n": {
"type": "string",
"description": "Offers to return, integer 1-10 (default 5). The top 3 are re-checked live."
},
"q": {
"type": "string",
"description": "What the agent needs, in words (required, <=200 chars)."
},
"kind": {
"type": "string",
"description": "Product kind filter: api_route (default coverage), mcp_tool, data_feed, digital_good, physical_good, local_service, tokenized, service."
},
"rail": {
"type": "string",
"description": "Payment rail filter: base, solana, a CAIP-2 network, or x402:evm / x402:xrpl / x402:zcash."
},
"max_price": {
"type": "string",
"description": "Max USD price per call, e.g. 0.01."
},
"min_health": {
"type": "string",
"description": "Minimum health score 0-1."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"description": "Horizon Pulse agent marketplace search: ranked x402 offers with live re-check and buy plans. The example is a trimmed real response recorded from GET /api/demo/market-search at 2026-10-12T04:09Z UTC; live values differ on every call."
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 05:52Z
- Last indexed by Roundhouse
- 2026-10-26 20:00Z
- Last enriched (probe, favicon, geo)
- 2026-10-12 17:46Z
- x402 version
- 2
- Max timeout
- 300s
- 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. 20 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 Horizon Pulse 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=Horizon%20Pulse' 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://horizonpulse.dev/api/market/search, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.