# TrollBridge Idempotency Key Generator

> TrollBridge Idempotency Key Generator is a paid API for AI agents from mini-tollbooth.onrender.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).

Generates or retrieves an idempotency key for a specified write intent, preventing duplicate transactions in AI agent workflows

## Facts

- Endpoint: GET https://mini-tollbooth.onrender.com/idempotency?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/trollbridge-idempotency-key-generator-75bdd2cb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cTxZLqJNkhy5h79WZtn8i

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 trollbridge-idempotency-key-generator-75bdd2cb
```

Example prompt: Before I retry this failed smart contract write, generate an idempotency key for the write intent 'transfer 100 USDC to 0xABC...' so we don't accidentally submit the transaction twice — the previous attempt timed out after 3200ms on the /tx endpoint.

## When to prefer this

Use this endpoint when an AI agent needs to safely retry a failed write operation — such as a blockchain transaction, DeFi approval, or smart contract call — and must guarantee idempotency to avoid duplicate execution or double-spending. Prefer this over rolling your own nonce when operating within the TrollBridge safety ecosystem, where the generated key integrates with other safety checks like /tx-dryrun, /preflight, and /tx-simulate.

## Known failure modes

- Missing required write_intent field returns a validation error
- Malformed transport_evidence object may cause parsing failure
- Network timeout from Render cold-start latency
- Ambiguous write_intent string may generate colliding keys across different intended operations

## How this service works

The insurance booth for AI agents, with Mini's Agent Supply Store on the side of the road. One hundred checkpoints: pre-transaction safety lanes (honeypot, approval-risk, rug-score, receipt-check, tx-dryrun, permit-scan, airdrop-verdict, deployer-history, wallet-watch, secret-scan at $0.02 USDC per call; the protection tier — /contract-check, /approval-screen, /tx-plain-english, /honeypot-check, /tx-simulate, /redteam, /skill-scan, /verdict, /egress-audit, /tool-gate, /airlock, /repo-scan, /prove, /task-scope — at $0.10; the one-call /shield don't-get-rugged screen at $0.25; the full /preflight bundle at $0.05), bounty intel (bounties, fresh, verdicts, deadlines, sweepstakes, opportunities) at $0.02 USDC per call, trader intel (/prices and /quant at $0.02; /enrich and /token-check at $0.05; /contract-check and /honeypot-check at $0.10; /sec-facts at $0.05), market intel (/markets and /search at $0.05; /grants at $0.02), DeFi intel (/yields and /new-pairs at $0.05; /gas and /defi at $0.02), AI intel (/models at $0.02), agent-ops intel (/prompt-cost, /model-picks, /rpc-speed, /terms-tldr, /scrape, /gigs, /retry-verify, /idempotency, /verify-independent at $0.02; /site-watch, /wallet-check, /code-run, /regulatory-pack, /sage, /cron-watch, /caveat-check, /tripwire, /escrow, /trust, /bridge-fees, /dao-votes, /dev-activity, /dex-arb, /dydx-perps, /funding-rates, /gas-predict, /hack-tracker, /long-short-ratio, /lp-yields, /mev-scan, /open-interest, /perp-basis, /polymarket-odds, /rwa-watch, /sentiment, /stablecoin-flows, /tokenomics, /top-movers, /whale-watch, and /yield-stable at $0.05; /approval-screen, /tx-plain-english, /tx-simulate, and /task-scope at $0.10; /scam-scan deep scan at $5.00 or 30-day subscription at $30.00), supply store (/road-pack combo meal at $0.05; curated datasets, the /audit-prep pre-audit review, and the /prove-state symbolic-execution run at $1.00; the /audit AI-agent audit at $25.00). Every lane answers before money moves — heuristic verdicts, not audits. Don't get rugged.

## Output

Returns a structured object containing an idempotency key or deduplication token tied to the specified write intent, optionally scoped by a caller nonce. The key can be used to safely retry failed writes without risking duplicate execution.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "write_intent"
 ],
 "properties": {
  "caller_nonce": {
   "type": "string",
   "description": "Disambiguator for genuinely-different writes with identical intent text — optional, generated if omitted."
  },
  "write_intent": {
   "type": "string",
   "description": "The write the key covers — required."
  },
  "transport_evidence": {
   "type": "object",
   "description": "{outcome, endpoint, elapsed_ms} — what failed, optional."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/trollbridge-idempotency-key-generator-75bdd2cb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mini-tollbooth.onrender.com](https://www.zero.xyz/host/mini-tollbooth.onrender.com/llms.txt)