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ManyLives Proof Verify
x402
ManyLives Proof Verify is a paid API for AI agents from api.manylives.me, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-10).
Verifies that a SHA-256 hash was previously stamped on the Base blockchain by returning Merkle proof data and on-chain transaction details
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call tools for people building AI agents: live web search and page contents, point-in-time crypto market data and news for backtests (no lookahead), verifiable track records of 1,000 crypto strategies locked on the Base network, company profiles, quick AI and batch prices. Ask us to turn a public website into a JSON endpoint. Pay per call, no account, free trial.
Output
A JSON object containing the queried hash, an array of stamp records (each with transaction hash, Merkle leaf, root, and proof path, stamp status such as 'on_chain', stamp ID, block time, and received timestamp), plus a how_to_check field with instructions for independently verifying the proof.
Example use cases
Verify backtest result integrity
“I submitted a backtest hash last week — can you check if 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08 is confirmed on-chain with a Merkle proof so I can prove the result wasn't tampered with?”
Audit trading strategy record
“We need to audit our trading strategy's track record — please verify that hash 3a7bd3e2360a3d29aa625571c78c1d81 was permanently stamped on Base and return the transaction ID and block time.”
Confirm document timestamp on blockchain
“Can you confirm that the SHA-256 hash of our contract document, abc123def4567890abcdef1234567890abcdef1234567890abcdef1234567890ab, was recorded on the Base network and give me the full Merkle proof so I can share it as evidence?”
Technical details
Endpoint
GEThttps://api.manylives.me/paid/proof/verify?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need cryptographic, on-chain proof that a specific SHA-256 hash was previously recorded on the Base blockchain, especially for verifying trading strategy backtests, track records, or any document whose integrity must be independently auditable via Merkle proof. Prefer this over off-chain timestamp services when tamper-evidence and decentralized verifiability are required.
Side effects
- Hash not found — no stamp record exists for the provided SHA-256 hex; returns empty stamps array
- Invalid hash format — non-hex or wrong-length string causes a 400-level error
- Network or Base RPC unavailability may cause delayed or failed lookup
- Stamp pending — hash was recently submitted and may not yet have on_chain status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"hash": "9f86…0a08",
"stamps": [
{
"tx": "0x…",
"leaf": "…",
"root": "…",
"batch": "2026-10-09T12",
"proof": [
{
"side": "right",
"sibling": "…"
}
],
"status": "on_chain",
"leaf_is": "sha256(hash + '|' + stamp_id)",
"stamp_id": "stp_k3m8q2r7t9w4y6z2",
"block_time": "2026-10-09T13:05:12Z",
"received_at": "2026-10-09T12:00:00Z"
}
],
"how_to_check": [
"…"
]
}
}Tags
x402
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