# Synthex Forge Evidence Query

> Synthex Forge Evidence Query is a paid API for AI agents from x402.synthexforge.com, paid per call via x402, $0.15/call, status unknown (last checked 2026-10-23).

Queries previously ingested sealed evidence entries against a specific actor DID, returning cryptographically signed attestation results.

## Facts

- Endpoint: POST https://x402.synthexforge.com/v1/evidence/query?utm_source=zero.xyz
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthex-forge-evidence-query-c0931331
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2vWihuLevqFozTswosySQ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability synthex-forge-evidence-query-c0931331 -d '<json body>'
```

Example prompt: Search our sealed evidence store for all records associated with actor DID 'did:key:z6Mk...' and return their attestation results.

## When to prefer this

Use this endpoint when you need to query previously ingested, cryptographically sealed evidence entries tied to a specific actor DID with Ed25519 + SHA-256 signed artifacts. Prefer this over generic database lookups when you need tamper-evident, attestation-grade evidence retrieval with governance guarantees in a decentralized identity context.

## Known failure modes

- Invalid or malformed actor_did returns a 400 or empty result
- Entries array contains unrecognized or tampered sealed entries causing validation rejection
- HTTP 402 returned if USDC payment on Base mainnet (chain ID 8453) is not provided or fails
- Empty entries array returns no results without error
- Network or service outage returns a 5xx response

## 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 an 'ok' boolean indicating success, along with any matched evidence query results tied to the specified actor DID from the sealed evidence store.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "entries": {
   "type": "array",
   "description": "Sealed entries previously returned by /v1/evidence/ingest."
  },
  "actor_did": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthex-forge-evidence-query-c0931331/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.synthexforge.com](https://www.zero.xyz/host/x402.synthexforge.com/llms.txt)