# Quantum Bear MicroAPI

Paid, deterministic technical tools. x402 v2 exact, native USDC. Network: eip155:8453.

Catalog: https://quantumbears.is/api/microapi/catalog
OpenAPI: https://quantumbears.is/api/microapi/openapi.json
Conformance criteria: https://quantumbears.is/api/microapi/conformance.json
Offline checker: https://quantumbears.is/api/microapi/check-conformance.py


Buyer client: https://quantumbears.is/api/microapi/buyer-client.tar.gz
Quickstart: https://quantumbears.is/api/microapi/buyer-client.txt
Quote-only by default; --pay and an explicit maximum authorize a real Base mainnet purchase.
- POST https://quantumbears.is/api/microapi/csv-preflight — Validate CSV columns and quoting before importing tables. Detect malformed quoting, uneven row widths, duplicate headers, blank cells and formula-like cell prefixes. Formula prefixes are a heuristic, not a malware verdict. — 0.003000 USDC
- POST https://quantumbears.is/api/microapi/json-structure — Validate JSON against a self-contained JSON Schema. Check JSON syntax, duplicate object keys, schema compliance and document complexity. Reports machine-readable validation errors; external references and regex constraints are unsupported. — 0.003000 USDC
- POST https://quantumbears.is/api/microapi/dns-records — Inspect DNS records for a domain: A, AAAA, MX, NS, TXT and canonical name. Return real record sets and per-query error status. DNSSEC validation is not claimed. — 0.005000 USDC
- POST https://quantumbears.is/api/microapi/email-domain — Check email domain SPF, DMARC and MX records, including null MX and the published DMARC policy. Diagnose domain authentication setup. Does not verify mailbox existence, SMTP delivery or a person. — 0.005000 USDC
- POST https://quantumbears.is/api/microapi/x402-preflight — Verify x402 endpoint payment requirements before paying: inspect a live HTTP 402 challenge, protocol version, accepted networks, token, recipient, amount and discovery metadata. No payment is sent; settlement success remains unknown. — 0.005000 USDC
- POST https://quantumbears.is/api/microapi/http-tls — Inspect HTTP response status, selected security headers and the verified TLS certificate of a public URL. Return certificate expiry, fingerprint, TLS version and observed latency. Does not perform a vulnerability scan. — 0.010000 USDC

Unpaid POST returns HTTP402 and PAYMENT-REQUIRED. Retry POST with PAYMENT-SIGNATURE generated by an x402 v2 EVM client. Inspect PAYMENT-RESPONSE and X-Settlement-Confirmation. Never send a direct transfer as a substitute for a signed API call. Examples in the catalog are recorded controlled test runs; live values vary. Request bodies are not retained. No demand, earnings or SLA claims are made.