Synthex Forge Evidence Ingest

x402

Synthex Forge Evidence Ingest is a paid API for AI agents from x402.synthexforge.com, paid per call via x402, $0.2/call, status unknown (last checked 2026-10-23).

Records a signed, tamper-evident evidence artifact for a given action, actor, and optional policy reference into an Ed25519+SHA-256 attested audit log.

Price / call$0.2

Seller volume →—

Success—

StatusUnknown

How this service works

Synthex Forge x402 Receive: 41 paid verification, attestation and governance endpoints (Ed25519 + SHA-256 signed artifacts) plus free verify/public-key/standard sibling routes. Paid routes answer HTTP 402 with an x402 v2 `payment-required` envelope (atomic USDC on Base mainnet, chain ID 8453). Free routes are declared with `security: []` per the x402scan discovery spec.

Output

Returns a JSON object with {ok: true} confirming the evidence artifact was successfully ingested and cryptographically attested. The signed artifact is stored server-side with Ed25519 signature and SHA-256 hash for future verification.

Example use cases

Compliance audit trail for DAO vote

“Log that the actor did:key:z6MkABC123 cast a governance vote for proposal #17 under policy ref 'dao-voting-v1', timestamped at 2024-06-01T14:00:00Z, with metadata noting the vote was 'approve'.”

AI agent action attestation

“Ingest an evidence record showing that my AI agent service key did:web:agent.myapp.com executed a data export action at epoch 1717200000, tagged to policy ref 'data-handling-policy-3', so we have a signed audit artifact.”

On-chain event governance record

“Create an attestation entry for the action 'smart contract parameter update' performed by did:ethr:0xABCD under governance policy 'param-update-v2', with action hash '9f3e1a...' and metadata including the old and new parameter values.”

Technical details

Endpoint

POSThttps://x402.synthexforge.com/v1/evidence/ingest?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need cryptographically signed, tamper-evident audit records anchored to a DID-identified actor and an optional policy reference, with Ed25519+SHA-256 attestation. Prefer it over generic logging services when compliance, governance, or verifiable audit trails are required, especially in decentralized or blockchain-adjacent workflows using USDC micropayments on Base.

Side effects

Missing required 'action' or 'actor_did' fields returns a 400 validation error
Invalid DID format for actor_did may cause rejection
Malformed action_hash (non-hex or wrong length) may trigger a 400 error
Payment not provided or invalid x402 USDC payment results in HTTP 402 payment-required response
Network or chain issues on Base mainnet may delay payment confirmation and return a 402 or 503
Duplicate submissions with same action_hash may return an idempotency conflict or silently succeed depending on server policy

Input

Schema · Request body

Field	Type	Description
action	string	Human-readable description of the action.
metadata	object
actor_did	string	The actor who did the action (DID / wallet / service key).
timestamp	—	Optional caller-claimed event timestamp (epoch or ISO).
policy_ref	string
action_hash	string	Optional hex SHA-256 of the action; if omitted, derived deterministically.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true
  }
}

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