Physics ODE solver (SciPy): coupled ODE systems from parameterized templates (orbital 2-body, oscillator, pendulum, heat transfer, RC/RLC, projectile-with-drag, SIR) or a generic linear system, with energy/conservation checks. Paid in USDC on Base or Solana.

Exact symbolic computation (SymPy): simplify, differentiate, integrate, solve equations/systems, limits, series, Laplace/Fourier transforms, arbitrary-precision eval. Expressions are JSON ASTs; every result is numerically verified. Paid in USDC on Base or Solana.

Quantum circuit simulation (Qiskit Aer): statevector, density-matrix (noise), stabilizer, and MPS methods; shots, expectation values, and seeded determinism. Sync tier up to 24 qubits. Paid in USDC on Base or Solana.

Short Term Holder NUPL — Short Term Holder NUPL (STH-NUPL) is Net Unrealized Profit/Loss computed on UTXOs younger than 155 days, serving as an indicator of the behaviour of short-term investors. Data by Glassnode.

Metadata, an AI-written summary, and a preview of the opening pages of a PDF - understand what a document says without reading the whole thing. The catalog's first AI-summarization pack, complementary to document-intel's deterministic format extraction (no AI, no summarization there). Document brief skill pack: one x402 payment runs 3 underlying tools (pdf-info, pdf-summarize, pdf-extract-pages); partial-success per step.

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2`). Supports comma-separated lists.

Detect AI-generated writing with a calibrated probability score. Returns a 0-1 likelihood, a verdict, suspicious phrases, and per-axis style signals (em-dash overuse, hedge phrases, formulaic transitions). Works as an AI content detector, GPT detector, or ChatGPT-text checker.

Bitwise AND across two or more non-negative integers (given as decimal strings, evaluated as arbitrary-precision BigInt). Returns the result in decimal, hex and binary.

Crawl a website from a starting URL and return each page as clean markdown: breadth-first over internal links, bounded by page count and depth, honouring robots.txt, with per-page title, status, depth and outbound links. Use it when an agent needs a whole section of a site rather than one known page.

Pull SEC filings, the latest close, historical prices, and macro context for a single ticker in one pass. Financial research skill pack: one x402 payment runs 6 underlying tools (stock-quote, stock-history, edgar-filings, edgar-company-facts, edgar-insider-trades, fred-series); partial-success per step.

Browse Quotient's canonical underlying-asset directory without forecast or venue-price data. Use this for stable Asset UUIDs and assetKey values, names, tickers, aliases, exact platform identifiers, and active directly linked market counts. The complete filtered catalog returns in one response; use asset search when the user needs linked prediction-market intelligence.

Search Twitter/X for user accounts matching a keyword or phrase. Returns up to 20 matching user profiles per page with pagination support. Useful for discovering users by topic, name, or keyword. Query params: query (string, required) - search keyword or phrase; next_token (string, optional) - pagination cursor from previous response, e.g. GET /users/search?query=bitcoin. Returns X v2 API-compatible JSON.

Search functions or classes by meaning and by keyword. ``mode=bm25`` ranks by lexical match, ``mode=vector`` by embedding similarity to the query text, and ``mode=hybrid`` (default) fuses both rankings with reciprocal rank fusion. Returns up to ``top_k`` matches with their repository, file path and score; the ``domain``, ``ontology_concept_uri``, ``confidence_min`` and ``has_tests`` filters apply to Function results only.

Xynaptic Health News — live health/medicine press feed (Google News RSS): real titled articles from medical media + optional LLM synthesis. GET (&summarize=true). Informational only.

IBAN validation (ISO 13616 mod-97 and per-country length, SEPA membership; for Spain also the national CCC check digits and bank name). Computed locally, IBAN is not stored.

Munition Upload: x402-paid temporary file hosting for AI agents. Buy a presigned upload slot, upload one local file or generated artifact up to 10 MB, and get a public non-guessable files.munition.io link retained for 7 days. Useful for PDFs, screenshots, images, logs, JSON, reports, browser sharing, webhook sharing, and agent-to-human handoff.

Parse a coordinate string into decimal lat/lon. Accepts a plain decimal pair ('40.4462, -79.9822') or DMS with hemisphere letters ('40°26'46"N 79°58'56"W'). Anything unrecognized is a clean 400.

Read current gas price and base fee, live from Base mainnet, for a fraction of a cent. No API key, no account — a wallet is the only requirement, and you are charged only if the read succeeds. Plain unsigned data; the attested version of chain reads is /v1/oracle/onchain. Answers are read at the moment of the call and stamped with the block they came from where applicable.

Convert a non-negative weight or mass value between common units. Use this deterministic endpoint when an agent needs a precise unit conversion.

International phone number validation and normalization (libphonenumber): validity, country, E.164, national/international formats and line type.