Busker

Endpoints (24 live)

• POST /tz — Time-zone conversion on the IANA database: convert a time between zones with offsets, abbreviations and DST flags, describe zones at an instant, or compute the shared business-hours window across several zones for meeting scheduling. (0.001 USDC on Base)
• POST /validate — Validate JSON against a JSON Schema (draft-07, 2019-09, 2020-12, with string formats): every violation with path, keyword and message. One instance, a JSON string, or up to 100 instances against one schema. (0.002 USDC on Base)
• POST /holidays — Public holidays for ~200 countries and their subdivisions, plus business-day arithmetic: is this date a holiday or business day, next business day, add N business days, count business days between dates. Configurable weekend and holiday types. (0.002 USDC on Base)
• POST /iban — Validate and decompose IBANs (checksum, country format, IBAN registry, SEPA membership; bank/branch/account parts) and BIC/SWIFT codes. Batches up to 100. Format validation only — does not prove an account exists. (0.002 USDC on Base)
• POST /tokens — Exact BPE token counts for OpenAI-family encodings (o200k_base for GPT-4o/4.1/5, cl100k_base for GPT-4/3.5/embeddings), single text or batches, with optional truncation to a token budget. Up to 512 KB per call. (0.001 USDC on Base)
• POST /verify-sig — Verify EVM signatures offline: EIP-191 personal messages, EIP-712 typed data, and x402/EIP-3009 payment authorizations (paste a raw Payment-Signature header) — recovers the signing wallet, checks it against an expected address, and reports the authorization's amount, payee and validity window. No chain reads. (0.002 USDC on Base)
• POST /ocr — OCR a scanned PDF into clean text (Tesseract, English, machine-printed documents). Up to 25 pages per call. PDFs that turn out to have a text layer are extracted the fast way at the same price. (0.01 USDC on Base)
• POST /qr — Generate a QR code from text as PNG (base64) or SVG. Custom module size, quiet-zone margin, and hex colours. Deterministic, capacity-capped at 2953 bytes. Set delivery to "url" to receive a short-lived download link instead of inline data. (0.005 USDC on Base)
• POST /fetch — Fetch a public web page and return clean markdown (or structured JSON) — URL in, agent-ready content out, typically 80-85% fewer tokens than raw HTML. Handles redirects and compression. (0.005 USDC on Base)
• POST /lang — Language identification for 180+ languages (every language with ≥1M speakers): ISO 639-3 code, ISO 639-1 code and English name, with ranked candidates and a confidence margin. Single text or batches up to 100. (0.001 USDC on Base)
• POST /fx — Live foreign-exchange reference rates (European Central Bank daily fixes, ~30 major currencies): any cross-rate from any base, optional amount conversion. Refreshed daily; response carries the rate date. (0.001 USDC on Base)
• POST /transform — Convert raw HTML into clean markdown. Typically cuts page tokens by 80-85% before they hit an LLM context window. (0.005 USDC on Base)
• POST /screen — Fuzzy sanctions screening against the US OFAC SDN list (public-domain source, refreshed daily): name in, scored matches with programs and aliases out. Batches up to 50. Coverage is OFAC SDN only — stated in every response. (0.02 USDC on Base)
• POST /convert — Convert data between JSON, YAML, CSV, and XML. Deterministic format juggling done off-context, with edge cases handled. (0.005 USDC on Base)
• POST /decode-tx — Decode EVM calldata or a Base-mainnet transaction into human-readable form: function selector, matched signature, named args, plus ERC-20/USDC transfer events from the receipt — verify an x402 settlement receipt (tx hash in, payer/payee/amount out) in one call. (0.005 USDC on Base)
• POST /phone — Validate and normalize phone numbers (Google libphonenumber): validity, E.164/international/national formats, country, region, and line type (mobile/fixed/VoIP). Single number or batches up to 100. (0.002 USDC on Base)
• POST /chunk — Split a document into token-bounded chunks at natural boundaries (paragraphs/sentences), with optional overlap. Ready-to-embed pieces for RAG, no tokens spent on the splitting logic. (0.005 USDC on Base)
• POST /image — Modify an image in one call: crop, resize, convert to greyscale, and re-encode (PNG/JPEG/WebP) — applied in that order, any combination. Deterministic, no upscaling surprises. Set delivery to "url" to receive a short-lived download link instead of inline base64. (0.002 USDC on Base)
• POST /pdf — Extract clean markdown text from a PDF (text-layer PDFs; no OCR). Turns a document an agent can't cheaply read into compact tokens. (0.002 USDC on Base)
• POST /extract — Extract structured JSON from a web page: title, byline, publish date, Open Graph/meta tags, embedded JSON-LD (schema.org), links, and images. Deterministic, no LLM. (0.002 USDC on Base)

+4 more endpoints.