# SYNTHORA Digital Institution

> SYNTHORA Digital Institution is a paid API for AI agents from institution.hergertsynthora.com, paid per call via x402, $0.1/call, status down (last checked 2026-09-15).

Provides a combined legal identity, dispute arbitration, and cryptographic proof/notarization service for autonomous AI agents in a single paid API call.

## Facts

- Endpoint: POST https://institution.hergertsynthora.com/service
- Price: $0.1/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-digital-institution-037fc8d3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LaFOXZQmaKPIEmJBLfnfd

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 synthora-digital-institution-037fc8d3 -d '<json body>'
```

Example prompt: Notarize the output of my agent's last task — the content is the JSON object it produced — and bind the proof to module hash 'abc123', then give me an Ed25519-signed receipt with a Bitcoin-anchored merkle root so I can verify it independently later.

## When to prefer this

Choose this endpoint when an AI agent needs cryptographic proof of its own execution, legal identity anchored to a real EU company, or deterministic dispute resolution between agents — all in a single paid call. Prefer it over standalone notarization services when you need Bitcoin-anchored permanence (OpenTimestamps), EU legal backing (HERGERT SYNTHORA S.L.U.), or on-chain identity (ERC-8004, did:web, Verifiable Credentials) rather than just a hash. Especially valuable in multi-agent commerce scenarios where payment release, delivery verification, and arbitration must be composable and auditable.

## Known failure modes

- Payment not received or insufficient: returns 402 Payment Required
- Invalid or missing op field: returns error indicating unrecognized operation
- Dispute evidence incomplete (missing payment_tx, endpoint, or agreement_hash): returns validation error
- Receipt ID not found for verify/anchor: returns not-found error
- OTS calendar unreachable: partial success with fewer calendar confirmations
- Module hash mismatch for execution proof: returns integrity error

## How this service works

Digital institution layer for autonomous AI agents, in one call: LEGAL, JUSTICE and PROOF. LEGAL: machine-readable legal identity backed by a real EU company (HERGERT SYNTHORA S.L.U., Spain) with ERC-8004 on-chain identity, did:web and Verifiable Credentials, plus EU compliance triage (EU AI Act risk tier, MiCA, company formation). JUSTICE: deterministic agent-to-agent dispute arbitration and pre-payment release checks using verifiable evidence (payment tx on Base, endpoint liveness, delivery vs promise, notarized agreements). PROOF: SHA-256 notarization with Ed25519 receipts, proof of honest execution bound to the exact code hash, and Bitcoin-anchored merkle roots via OpenTimestamps so every receipt is independently verifiable forever. Composes SYNTHORA's whole trust stack in ONE paid call. Keyless, deterministic, Ed25519-signed. 0.02 USDC on Base. SYNTHORA.

## Output

Returns a JSON object with ok:true, a niche field ('institution'), and a result containing the SHA-256 hash of the notarized content, a unique receipt ID (nt-…), a merkle root, and confirmation from multiple OTS calendars (alice, bob, finney). For disputes, returns a deterministic ruling. For identity/compliance ops, returns structured legal or regulatory metadata. All results are Ed25519-signed and independently verifiable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "op"
 ],
 "properties": {
  "op": {
   "type": "string",
   "description": "manifest | notarize | execution | agreement | verify | anchor | dispute | release-check | aiact | mica | constitucion | law-delta"
  },
  "input": {
   "type": "string",
   "description": "execution: task input"
  },
  "module": {
   "type": "string",
   "description": "execution: bind the proof to this module's exact code hash"
  },
  "output": {
   "type": "string",
   "description": "execution: produced output"
  },
  "content": {
   "type": "string",
   "description": "notarize: string/object to notarize"
  },
  "evidence": {
   "type": "object",
   "description": "dispute: payment_tx, endpoint, expected_payto, delivered, promised, agreement_hash"
  },
  "receipt_id": {
   "type": "string",
   "description": "verify/anchor: nt-.. receipt id"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-digital-institution-037fc8d3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from institution.hergertsynthora.com](https://www.zero.xyz/host/institution.hergertsynthora.com/llms.txt)