toolbelt402

Endpoints (21 live)

• GET /url/preflight — Check a URL before fetching it: is it alive, final URL after redirects, HTTP status, content type, HTML title, and whether robots.txt allows your user-agent. Link checker and fetch preflight for agents. (0.005 USDC on Base)
• POST /json/validate — Validate JSON data against a JSON Schema (draft-07, 2019-09, 2020-12) — returns exact error locations, keywords, and messages for programmatic handling. Deterministic schema validation. (0.002 USDC on Base)
• POST /text/diff — Compare two texts — unified diff patch plus added/removed/unchanged counts, by lines, words, or characters. Verify edits and detect changes deterministically. (0.002 USDC on Base)
• POST /hash — Hash a string or bytes with multiple algorithms in one call: SHA-1, SHA-256, SHA-384, SHA-512, SHA3-256, and keccak-256 (Ethereum). Input as UTF-8, base64, or hex; hex digests out. (0.002 USDC on Base)
• POST /json/query — Query JSON with a JMESPath expression — extract, filter, project, and reshape nested data with the AWS-standard query language. Deterministic JSON extraction. (0.003 USDC on Base)
• POST /json/to-csv — Convert an array of JSON objects into CSV — column union across rows or explicit column order; nested values are JSON-stringified into cells. (0.002 USDC on Base)
• POST /regex/test — Test and debug a regular expression against up to 50 sample strings — real match results, capture groups, named groups, and pass/fail against expectations. Deterministic regex testing. (0.002 USDC on Base)
• POST /validate/checksum — Validate identifiers by checksum: IBAN (mod-97), card numbers (Luhn), EAN-13, ISBN-10/13, UUID (RFC-4122), ULID. Batch up to 100 per call with per-item reasons. (0.002 USDC on Base)
• GET /time/math — Date and time arithmetic done right: difference between two datetimes, add or subtract ISO-8601 durations, convert an instant into any IANA timezone with UTC offset and weekday. (0.001 USDC on Base)
• POST /markdown/to-html — Render Markdown to HTML — CommonMark with autolinking; raw HTML in the input is escaped, not executed. The inverse of /html/to-markdown. (0.003 USDC on Base)
• POST /encode — Encode or decode text: base64, base64url (padding handled), hex, URL percent-encoding, and HTML entities. The conversions agents most often get wrong. (0.001 USDC on Base)
• POST /xml/to-json — Parse XML into JSON — validates first with line-numbered errors, preserves attributes, optional type coercion. Works for RSS feeds, sitemaps, and SOAP-ish payloads. (0.003 USDC on Base)
• POST /csv/to-json — Parse CSV into JSON rows — auto-detects the delimiter, handles quoted fields and headers, optional type coercion. Returns columns, row count, and per-row parse errors. (0.003 USDC on Base)
• POST /web/extract — Read a web page for me: fetches up to 5 URLs and returns the main article content as clean Markdown (nav, ads, and footers stripped) plus title, author, published date, canonical URL, links, images, word count and reading time. Typically 15-30x smaller than the raw HTML, so it saves far more in context tokens than it costs. Honors robots.txt by default. No browser or network access needed on your side. (0.02 USDC on Base)
• POST /jwt/decode — Decode a JWT — header, payload, and timing analysis (issued/not-before/expiry as ISO timestamps, expired flag, seconds until expiry). Decode only; signature is NOT verified. (0.002 USDC on Base)
• GET /cron/describe — Translate a cron expression into plain English (e.g. "Every 15 minutes, weekdays") — the companion to /cron/next. (0.001 USDC on Base)
• POST /json/diff — Structural diff of two JSON documents — add/remove/change operations with JSON-Pointer paths, before/after values, and an identical flag. Compare API responses and configs. (0.003 USDC on Base)
• POST /html/to-markdown — Convert HTML to clean Markdown — turn scraped web pages into LLM-ready text. Handles headings, lists, tables, links, code blocks. Deterministic, no LLM. (0.005 USDC on Base)
• GET /cron/next — Parse and validate a cron expression — returns the next N run times as ISO timestamps in any IANA timezone. Cron schedule checker. (0.001 USDC on Base)
• POST /json/repair — Fix invalid, malformed, or truncated JSON — repairs trailing commas, single quotes, unquoted keys, and cut-off LLM output; returns the parsed object plus corrected JSON text. Deterministic, no LLM. (0.005 USDC on Base)

+1 more endpoint.