PayPerByte
A curated library of live data feeds and oracles for AI agents — pay per call in USDC over x402, settled on Base mainnet. First-party, verifiable, no token. Every paid response carries an EIP-712 X-BYTE-Attestation receipt the agent verifies before acting.
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.
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 0.1 USDC on Base to 0xffFf…FE0DB. The signed payment is good for 5 minutes.
- Paid to
- 0xffFf…FE0DB
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 100000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xffFf4B8Da8C165B556326453446F6940C8AFE0DB",
"amount": "100000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"claim": "USDC is fully reserved 1:1"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"feed": "evidence-pack"
}
}
},
"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",
"required": [
"claim"
],
"properties": {
"claim": {
"type": "string",
"minLength": 1,
"description": "The statement to research and ground against cited sources — returns a signed citation bundle (retrieved sources + excerpts), e.g. \"USDC is fully reserved 1:1\". The receipt proves provenance/integrity of the returned bundle, NOT that the statement is true; no correctness or fact-check verdict is asserted."
},
"domains": {
"type": "array",
"items": {
"type": "string"
},
"description": "Optional allowlist of source domains to retrieve evidence from (e.g. [\"sec.gov\", \"circle.com\"]). Omit to search all indexed PayPerByte factual feeds."
},
"max_sources": {
"type": "integer",
"minimum": 1,
"description": "Optional cap on the number of cited sources in the returned evidence pack — bounds the response size. The price is a flat $0.02 per call regardless of how many sources are returned (it is not metered per source)."
},
"subscriber_address": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{40}$",
"description": "Optional. The Arbitrum address bound to the signed EIP-712 request, so a leaked query cannot burn another wallet's escrow."
}
}
},
"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"
}
}
}
}
}
},
"payperbyte-service-metadata": {
"tags": [
"payperbyte",
"evidence-pack",
"general",
"first-party"
],
"serviceName": "PayPerByte"
}
}Provenance
- Seen in the source catalog
- 2026-07-28 21:39Z
- Last indexed by Roundhouse
- 2026-07-28 22:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-11 17:46Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 404
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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service PayPerByte 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=PayPerByte' 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://x402.payperbyte.io/feeds/evidence-pack, 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.