SignalHarness x402 Services
Explore 330 pay-per-use x402 APIs and 27 agent-native digital products, with Base USDC service pricing, Polar checkout, and free discovery.
OtherLiveeip155:8453Exactvia cdp
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.
$19.08
Verified settled volume
6 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.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-20 20:01Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x02DC8F414eeBBadd9a9F383e87757beAB4BB1AB0The 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≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x02DC…B1AB0. The signed payment is good for 5 minutes.
- Paid to
- 0x02DC…B1AB0
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"symbol": "USDC",
"version": "2",
"decimals": 6
},
"payTo": "0x02DC8F414eeBBadd9a9F383e87757beAB4BB1AB0",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"text": "User-agent: *\nAllow: /"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"replay": false,
"result": {
"groups": [
{
"rules": [
{
"path": "example",
"directive": "allow"
}
],
"crawlDelay": 0,
"userAgents": [
"example"
]
}
],
"sitemaps": [
"example"
],
"warnings": [
"Verify the caller-supplied data before relying on this result."
],
"crawlDelay": 0,
"matchedRule": {},
"crawlAllowed": false,
"matchedGroup": [
null
]
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "robots_policy_parse",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "5000",
"resultSha256": "9f187257ea9c44cac9c39fc35e42f5352601cd2a27c6b8ee4122b8e15d4a2306",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [],
"properties": {
"url": {
"type": "string",
"pattern": "^https://",
"maxLength": 2048,
"minLength": 9
},
"text": {
"type": "string",
"maxLength": 65536,
"minLength": 0
},
"userAgent": {
"type": "string",
"maxLength": 256,
"minLength": 1
},
"targetPath": {
"type": "string",
"maxLength": 2048,
"minLength": 1
}
},
"maxProperties": 3,
"minProperties": 1,
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"status",
"replay",
"requestId",
"executionId",
"result",
"receipt",
"artifacts"
],
"properties": {
"replay": {
"type": "boolean"
},
"result": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"groups",
"matchedGroup",
"matchedRule",
"crawlAllowed",
"sitemaps",
"crawlDelay",
"warnings"
],
"properties": {
"groups": {
"type": "array",
"items": {
"type": "object",
"required": [
"userAgents",
"rules",
"crawlDelay"
],
"properties": {
"rules": {
"type": "array",
"items": {
"type": "object",
"required": [
"directive",
"path"
],
"properties": {
"path": {
"type": "string",
"maxLength": 2048,
"minLength": 0
},
"directive": {
"enum": [
"allow",
"disallow"
],
"type": "string",
"maxLength": 8,
"minLength": 5
}
},
"maxProperties": 2,
"minProperties": 2,
"additionalProperties": false
},
"maxItems": 256,
"minItems": 0
},
"crawlDelay": {
"type": [
"number",
"null"
]
},
"userAgents": {
"type": "array",
"items": {
"type": "string",
"maxLength": 256,
"minLength": 1
},
"maxItems": 32,
"minItems": 1
}
},
"maxProperties": 3,
"minProperties": 3,
"additionalProperties": false
},
"maxItems": 256,
"minItems": 0
},
"sitemaps": {
"type": "array",
"items": {
"type": "string",
"maxLength": 2048,
"minLength": 1
},
"maxItems": 256,
"minItems": 0
},
"warnings": {
"type": "array",
"items": {
"type": "string",
"maxLength": 1024,
"minLength": 1
},
"maxItems": 32,
"minItems": 0
},
"crawlDelay": {
"type": [
"number",
"null"
]
},
"matchedRule": {
"type": [
"object",
"null"
]
},
"crawlAllowed": {
"type": [
"boolean",
"null"
]
},
"matchedGroup": {
"type": [
"array",
"null"
]
}
},
"maxProperties": 7,
"minProperties": 7,
"additionalProperties": false
},
"status": {
"type": "string",
"const": "succeeded"
},
"receipt": {
"type": "object",
"required": [
"receiptId",
"serviceId",
"resultSha256"
],
"properties": {
"receiptId": {
"type": "string"
},
"serviceId": {
"type": "string"
},
"resultSha256": {
"type": "string",
"pattern": "^[0-9a-f]{64}$"
}
},
"additionalProperties": true
},
"artifacts": {
"type": "array",
"maxItems": 0
},
"requestId": {
"type": "string"
},
"executionId": {
"type": "string"
}
},
"additionalProperties": false
}
}
}
}
}
},
"payment-identifier": {
"info": {
"required": true
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"required"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z0-9_-]+$",
"maxLength": 128,
"minLength": 16
},
"required": {
"type": "boolean"
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-20 20:01Z
- Last indexed by Roundhouse
- 2026-09-24 07:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-20 19:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
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. 4 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 SignalHarness x402 Services 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=SignalHarness%20x402%20Services' 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://signalharness.ai/api/agent/services/robots_policy_parse/invoke, 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.