Sentinel402 · 402
Paid tools for AI agents over x402 + MPP. One wallet, no API keys, no accounts, no signup. Send a request; the 402 tells your agent the exact price in USDC on Base; it signs (EIP-3009), retries, and gets the answer. Fractions of a cent per call.
| Endpoint | What it does | Price |
|---|---|---|
POST /v1/scan | PII and secret guardrail for outbound agent payloads | $0.02 |
POST /v1/scan/batch | Batch PII/secret scan: up to 20 payloads, one payment | $0.05 |
POST /v1/audit | Compliance audit report: PCI-DSS / GDPR / HIPAA / secrets verdicts | $0.03 |
GET /v1/data/{collection} | Live crypto, stocks, news, weather, GitHub, sports, FX, packages, ENS and IP data | $0.003 |
POST /rcp/retrieve | RCP/1 retrieval over live data, with citations | $0.003 |
POST /mcp (scan_for_pii) | MCP tool: PII/secret guardrail | $0.02 |
POST /mcp (scan_batch) | MCP tool: batch PII/secret scan | $0.05 |
POST /mcp (audit_compliance) | MCP tool: compliance audit verdicts | $0.03 |
POST /mcp (get_live_data) | MCP tool: live data by collection | $0.003 |
POST /v1/scan/prompt | Prompt-injection guardrail for untrusted agent inputs | $0.01 |
POST /v1/scan/prompt/batch | Batch prompt-injection scan: up to 20 texts, one payment | $0.03 |
POST /mcp (scan_prompt_injection) | MCP tool: prompt-injection guardrail | $0.01 |
POST /v1/credits/buy | Prepaid credit pack: $5 -> 5,000 units, spend via X-Credit-Token on every paid route | $5 |
Try it
curl -si -X POST https://pii-guardrail.chronokey.workers.dev/v1/scan \
-H 'content-type: application/json' \
-d '{"text":"card 4242 4242 4242 4242, ssn 123-45-6789"}'
# HTTP/2 402 · PAYMENT-REQUIRED: eyJ4NDAyVmVyc2lv… · WWW-Authenticate: Payment …
Free first: POST /v1/trial (1,000 chars, 10/day/IP) — same engine, no payment.
High volume? Prepaid credit bundles: pay $5 once over x402/MPP,
receive 5,000 units (1 unit = $0.001), then redeem them with an X-Credit-Token
header on every paid route — balances live in a Durable Object and are deducted
atomically, so there is no per-call settlement at all. Balance check is free:
GET /v1/credits/balance.