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BYTE Library x402 Gateway – Stablecoin Rails Feed
x402
BYTE Library x402 Gateway – Stablecoin Rails Feed is a paid API for AI agents from x402.payperbyte.io, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).
Returns a cryptographically signed, EIP-712 provenance-stamped data feed covering stablecoin rail metrics, paid per-call in USDC over x402 with no API key required.
Price / call$0.03
Success—
StatusUnknown
How this service works
Cross-chain stablecoin supply (USDC/USDT/DAI/PYUSD) + Circle iris-api health.
Output
A JSON payload containing stablecoin rail metrics, accompanied by a cryptographic signature and an EIP-712 PayloadAttestation provenance stamp. Settlement occurs on Base (eip155:8453) and the price (~$0.019 USDC) is deducted per call.
Example use cases
Example prompt
“Can you pull the latest stablecoin-rails data feed from BYTE Library — the one that comes back cryptographically signed and EIP-712 provenance-stamped — and pay for it with my USDC wallet over x402?”
Technical details
Endpoint
GEThttps://x402.payperbyte.io/feeds/stablecoin-railsWhen to prefer
Choose this endpoint when you need verifiable, provenance-stamped stablecoin rail data with cryptographic attestation and no API key setup — ideal for AI agents that can pay autonomously in USDC via x402 and require tamper-evident data for downstream trust decisions.
Side effects
- Payment insufficient or rejected by x402 facilitator — 402 Payment Required response
- Wallet has insufficient USDC balance — payment cannot be completed
- Feed temporarily unavailable — 503 or timeout
- Malformed or missing payment header — 400 Bad Request
- Rate limiting or quota exceeded on the feed — 429 Too Many Requests
Input
{
"properties": "volume,velocity,liquidity"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"data": {
"v": 1,
"ts": "2026-06-12T04:53:35Z",
"feed": "stablecoin-rails",
"disclaimer": "For informational purposes. Settlement and merchant data reflects observed activity; trust signals are advisory, not guarantees.",
"circle_iris_api": {
"reachable": true,
"checked_at": "2026-06-12T04:53:35Z",
"probe_status_code": 404
},
"supply_by_chain": [
{
"chain": "ethereum",
"tokens": [
{
"supply": 51504269217.84,
"symbol": "USDC",
"address": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"
},
{
"supply": 97070655229.72,
"symbol": "USDT",
"address": "0xdAC17F958D2ee523a2206206994597C13D831ec7"
},
{
"supply": 4193430803.07,
"symbol": "DAI",
"address": "0x6B175474E89094C44Da98b954EedeAC495271d0F"
},
{
"supply": 1791407854.76,
"symbol": "PYUSD",
"address": "0x6c3ea9036406852006290770BEdFcAbA0e23A0e8"
}
]
},
{
"chain": "arbitrum",
"tokens": [
{
"supply": 3156794334.81,
"symbol": "USDC",
"address": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831"
},
{
"supply": 994853808.23,
"symbol": "USDT",
"address": "0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9"
}
]
},
{
"chain": "base",
"tokens": [
{
"supply": 4250305633.67,
"symbol": "USDC",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
]
},
{
"chain": "optimism",
"tokens": [
{
"supply": 169124213.86,
"symbol": "USDC",
"address": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85"
}
]
},
{
"chain": "polygon",
"tokens": [
{
"supply": 768196961.19,
"symbol": "USDC",
"address": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359"
}
]
}
],
"disclaimer_category": "commerce",
"cctp_first_party_probes": {
"routes": [],
"window_s": 21600
}
},
"feed": "stablecoin-rails",
"source": "byte-library-broadcast",
"txHash": "0xfe3e607184fc4aee89382fb11a022ffa29163d102b443092dc339f04d7031289",
"publisher": "0x48faae04641bca4acaa5a030f4b0b97f1184b167",
"timestamp": "2026-06-12T04:53:37Z",
"payloadHash": "0x5b1538d1da90836fb89216d3566d624ea1ff60188d969e234c7d4e0d4f4eb39c",
"payloadBytes": 1430
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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