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witness.holoweave.org Transaction Finality Verification
x402
witness.holoweave.org Transaction Finality Verification is a paid API for AI agents from witness.holoweave.org, paid per call via x402, $0.05/call, status down (last checked 2026-09-15).
Verifies finality and transfer details of Base blockchain transactions by tx hash or x402 payment-response header, returning a signed attestation with pass/fail verdict
Price / call$0.05
Success—
StatusDown
How this service works
Web bot auth debugging for AI agents, priced per check at $0.01. RFC 7638 keyid thumbprint verification, RFC 9421 Ed25519 signature verification, and per-verifier acceptance rules. Signed attestations, published fixtures, sources with dates.
Output
A signed Ed25519 attestation (with key_id and base64 signature) containing a verdict of 'pass' or 'fail' for each transaction, including finality status, block number, whether the transaction succeeded, detected USDC transfers (from/to/amount/symbol), and a summary of pass/fail counts across all checked items.
Example use cases
Confirm x402 payment before unlocking content
“I got this x402 PAYMENT-RESPONSE header from a client — can you verify it actually settled on Base mainnet and transferred at least 0.05 USDC to my address 0x9975...?”
Audit batch of payment transactions
“Check these two Base transaction hashes — 0x1785... and 0xabc9... — and tell me which ones are finalized and whether they each transferred 0.01 USDC to the right recipient.”
Independent settlement receipt for dispute resolution
“I need an independent signed attestation that transaction 0x1785... on Base (eip155:8453) succeeded and transferred USDC — something I can show as proof that the payment cleared.”
Technical details
Endpoint
POSThttps://witness.holoweave.org/v1/txs-finalityWhen to prefer
Use this endpoint when you need an independent, cryptographically signed third-party attestation that a Base blockchain transaction reached finality and carried the expected USDC transfer — particularly for x402 payment verification workflows where you need tamper-evident proof beyond just reading on-chain data yourself. Prefer it over raw RPC calls when auditability, non-repudiation, or dispute resolution require a signed witness receipt.
Side effects
- Transaction not yet finalized — verdict may be 'indeterminate' or pending
- Transaction hash not found on the specified chain — returned as 'unreachable'
- Unexpected transfer amount or recipient — verdict 'fail' when expect constraints not met
- Invalid chain ID provided — defaults to eip155:8453 if omitted
- Malformed payment_response header — may result in parse error or fail verdict
- Exceeding 10 items per batch — rejected by input schema validation
- Payment not made ($0.05 USDC required) — x402 payment required response
Output
Schema · Response
{
"example": {
"signature": {
"alg": "ed25519",
"value": "base64...",
"key_id": "aw-attest-2026-08"
},
"attestation": {
"verdict": "pass",
"endpoint": "txs-finality",
"evidence": {
"count": 2,
"items": [
{
"chain": "eip155:8453",
"found": true,
"index": 0,
"tx_hash": "0x1785…",
"verdict": "pass",
"finality": "finalized",
"findings": [],
"succeeded": true,
"transfers": [
{
"to": "0x9975…",
"from": "0x423d…",
"amount": "0.010000",
"symbol": "USDC"
}
],
"block_number": 50484884
}
],
"summary": {
"fail": 0,
"pass": 2,
"changed": [],
"unreachable": [],
"indeterminate": 0
}
}
}
}
}Tags
x402
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