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GBLIN AI Action Receipt Sealer
x402
GBLIN AI Action Receipt Sealer is a paid API for AI agents from gblin.digital, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Seals SHA-256 hashes of an AI action's input and output into a signed, append-only transparency log, returning a portable Ed25519 receipt with RFC 6962 inclusion proof and a blockchain-anchored checkpoint.
Price / call$0.01
Success—
StatusUnknown
How this service works
AI Action Receipts: seal the HASHES of an AI action (input/output as hashes; your action label + meta are published) into GBLIN's signed append-only transparency log. Portable receipt: Ed25519 signature + RFC 6962 inclusion proof + C2SP signed checkpoint; root anchored daily on Base (EAS). Proves existence and time — not a compliance certificate. Free reads + demo: gblin-mcp.gblin-mcp-worker.workers.dev/log. Offline verifier: github.com/gblinproject/gblin-treasury-risk-regime
Output
A portable cryptographic receipt containing an Ed25519 signature over the sealed hashes, an RFC 6962 Merkle inclusion proof placing the entry in the append-only transparency log, a C2SP signed checkpoint, and a reference to the daily root anchor recorded on Base via EAS. The action label, agent_id, tool, and meta fields are publicly published in the log.
Example use cases
Audit trail for autonomous research agent
“My research agent just finished summarizing a legal document — seal a transparency receipt with action label 'legal-summary', input hash 0xabc1230000000000000000000000000000000000000000000000000000000001, output hash 0xdef4560000000000000000000000000000000000000000000000000000000002, and agent_id 'legal-bot-v2'.”
Timestamping an AI content moderation decision
“I need a tamper-evident record that my content moderation model flagged a post right now — seal the action labeled 'content-moderation', with input hash 0x1111111111111111111111111111111111111111111111111111111111111111 and output hash 0x2222222222222222222222222222222222222222222222222222222222222222, tool is 'moderation-model-v3'.”
Proving AI code generation occurred pre-deployment
“Before I ship this AI-generated code, seal a signed receipt proving the code existed at this moment — action is 'code-generation', input hash 0xaaaa000000000000000000000000000000000000000000000000000000000001, output hash 0xbbbb000000000000000000000000000000000000000000000000000000000002, agent_id 'ci-agent', meta '{"repo":"my-project","pr":42}'.”
Technical details
Endpoint
POSThttps://gblin.digital/api/x402/sealWhen to prefer
Choose this endpoint when you need a lightweight, cryptographically verifiable, tamper-evident record that a specific AI action occurred at a point in time — without needing a full compliance certificate. Ideal for agents that must prove provenance of outputs, create audit trails, or demonstrate that an input/output pair existed before a given timestamp. Prefer this over generic logging when you want a portable, offline-verifiable receipt anchored to a public blockchain.
Side effects
- Invalid hash format (not 64 hex chars) returns validation error
- input_hash missing returns 400-level error
- Payment not included or insufficient USDC returns 402 Payment Required
- Log service unavailable returns 503
- meta field exceeds 512 chars returns rejection
- action label exceeds 128 chars returns rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| meta | string | Extra JSON object as a string (optional). PUBLISHED. |
| tool | string | Tool or model used (optional). PUBLISHED. |
| action | string | Short public label for what the AI did. PUBLISHED in the log: identifiers only, never secrets. |
| agent_id | string | Your agent identifier (optional). PUBLISHED. |
| input_hash | string | sha256 of your input, 64 hex chars (0x prefix optional) |
| output_hash | string | sha256 of your output, 64 hex chars (optional) |
Tags
x402
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