Validate a fixed JSON CSV column specification before assigning extraction or checking deliveries. Send typed column settings in requirements; returns the validated spec for /v1/data/csv/validate-data. Rejects unknown fields and unsupported settings. This checks the specification itself, not CSV data. No custom expressions, cross-column rules or prose-to-rule conversion. Schemas/examples attached; full contract: /openapi.json.

Validate CSV before import using a fixed JSON column specification. Checks missing/extra columns, required cells, string/integer/decimal/boolean/date types, uniqueness, allowed values and numeric/row-count bounds. Returns pass/fail with row/column error codes. POST JSON with csv and spec.columns; schemas/examples attached. Full contract: /openapi.json. Max 2,000 rows, 50 columns, 256 KiB; first 50 failures. No formulas, cross-column rules, fact checking or data repair.

Check one email address or domain. Report common address syntax, MX or null MX and A/AAAA fallback, SPF, exact-domain DMARC and optional caller-supplied DKIM selector records, and a small known disposable-domain list. DNS failures remain unknown. Does not verify a mailbox or predict delivery.

Annual US-GAAP facts by CIK, SEC sources, same-filing growth checks and observed revisions. Fast quote or coverage preview. Free SEC data; paid selection.

Check source overlap before counting corroboration. Supply 2-10 URLs, optional article HTML and citation chains. Returns duplicate URLs, shared links and supplied-source groups with locations. No fetching, truth or independence verdict. Schemas: /openapi.json.

Diagnose x402 protocol and discovery configuration with separate linter and compliance grades. Optional quote_mode fast returns a payable first 402; resend the same input with proof, save the job/capability and poll. Default preserves compute-first admission. Base or Solana, 0.05 USDC per completed scan. Failed or expired unfinished work is uncharged; never replace a pending proof. Reports expire after 24 hours. Probes never pay targets or certify paid delivery.

Render one public web page in a headless browser and extract bounded text and source links, for pages whose content appears only after JavaScript runs. Standard x402 resend with an immediate opt-in fast quote and private encrypted recovery, or default render-first preview and optional caller-carried snapshot. 0.01 USDC on Solana or Base mainnet per completed page; failed renders are never charged.

Fetch one public static HTML page after robots and public-address checks, then return bounded readable text, title, final URL and source links. Standard x402: POST the URL, sign the 402 and resend the same body. The 402 also returns an encrypted payment_request that pays for exactly the quoted fetch. No browser, login, summary or full-site crawl.