trustfetch.duckdns.org publishes 4 machine-payable endpoints over the x402 protocol, priced from $0.02 to $0.12 per call. Each was probed directly; the response code below is what it returned.
| Endpoint | Method | Price | Probe |
|---|---|---|---|
| /tools/injection-scan | POST | $0.02 | 200 |
| /tools/injection-scan/batch | POST | $0.12 | 200 |
| /tools/injection-scan/deep | POST | $0.1 | 200 |
| /tools/safe-fetch | POST | $0.03 | 402 |
Fast tier: scan text for prompt-injection techniques before your agent processes it. Heuristics first, LLM only on ambiguous cases.
Volume tier: scan up to 10 texts for a single flat price -- cheaper per item than calling the fast tier that many times separately.
Deep tier: always escalates to an LLM verdict, skipping the fast tier's confidence-gate shortcuts. For high-stakes untrusted input (about to execute code or approve a transaction).
Flagship bundle: fetch a URL, extract clean Markdown, and injection-scan the result in one priced call -- cheaper than calling fetch-clean and injection-scan separately.