Strale — Trust and Quality Infrastructure for AI Agents

# Strale > The trust layer of the agent economy. 270+ quality-scored API capabilities for AI agents. Strale is a capability marketplace for AI agents. It provides compliance checks, company data, payment validation, regulatory intelligence, and developer tools — all with transparent per-call pricing and quality scores. ## x402 Pay-Per-Use (recommended for agents) All 270+ capabilities are available via x402 — the HTTP-native payment protocol. Pay per request with USDC on Base mainnet. No signup, no API key needed. - Catalog: GET https://api.strale.io/x402/catalog - Discovery: GET https://api.strale.io/.well-known/x402.json - Protocol: USDC on Base mainnet (eip155:8453) - Pricing: $0.005 to $0.10 per call depending on capability Example: GET https://api.strale.io/x402/sanctions-check?name=John+Doe → HTTP 402 with paymentRequirements (USDC, $0.02) → Retry with X-Payment header containing signed USDC transfer → HTTP 200 with sanctions screening result ## API Key Access (for developers) - Base URL: https://api.strale.io/v1 - Execution: POST /v1/do - Auth: Bearer token (sign up at strale.dev) - Pricing: EUR wallet, prepaid via Stripe - Trial: €2.00 free credits, no card required ### Response structure POST /v1/do returns a two-tier response: ``` { "result": { // What you asked for "transaction_id": "...", "status": "completed", "capability_used": "iban-validate", "output": { ... }, // The actual capability result "provenance": { "source": "...", "fetched_at": "..." }, "price_cents": 0, "latency_ms": 8 }, "meta": { // Trust layer metadata "quality": { "sqs": 85, "label": "Good", ... }, "execution_guidance": { "usable": true, "strategy": "direct" }, "audit": { ... } // EU AI Act compliant audit trail } } ``` Free-tier responses also include `free_tier`, `usage`, and `upgrade` at the top level. Error responses are flat: `error_code` +