Get raw book ticker data at microsecond granularity

One random joke, in English or Spanish, filtered by category: programming, crypto or general. Unlike the usual one-liner endpoints this one takes parameters, returns an id so you can exclude what you have already seen, and accepts a seed for a reproducible answer.

Crypto ticker / bid and ask: live best bid, best ask, last price and volume for one Coinbase product from Coinbase's Exchange data host, an independent second source to market.quote. Input: product_id such as BTC-USD.

Converts between hex, decimal and UTF-8 text in one call, with big integers handled exactly. For reading raw RPC output, which comes back as hex and overflows a JavaScript number.

Check a public domain's email authentication and anti-spoofing posture using MX, SPF, DMARC, caller-selected DKIM, MTA-STS, TLS-RPT, and BIMI DNS evidence.

Current US weather conditions (temp in C+F, humidity, wind, pressure, description) from the NWS for coordinates OR a US address (auto-geocoded).

Base network status and gas price: current block height and gas price (wei and gwei), live from a Base mainnet RPC node. Use it to check Base is moving, time an on-chain action or estimate gas before sending a transaction. Keyless, pay per call. No input needed.

OpenAI-compatible chat completion, priced by counted input tokens + max output tokens at per-model rates

Website accessibility audit (a11y, WCAG compliance check): WCAG 2.1 level A and AA conformance of any live URL or raw HTML, tested with axe-core in a real headless browser. Returns every violation with rule id, impact, help text and affected node count. Deterministic rules; a check that cannot run returns an error, never a pass.

Execute Python or JavaScript code in a secure, isolated cloud sandbox. Returns stdout, stderr, and the expression result. No setup needed; pay per call via x402. 30s timeout, 10k char code limit. A run that hits the time limit is returned with timedOut: true and the output it printed, and is charged.

List crypto up/down prediction markets

OpenAI Responses API over x402 - point the OpenAI SDK's responses.create() (or the OpenAI Agents SDK) at base_url https://agent402.tools/v1/auto and pay $0.01 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Responses wire.

Fetch the verified Solidity source files and compiler metadata for a contract address from an open verified-contract repository. Covers 8 EVM mainnets (ethereum, base, polygon, arbitrum, optimism, bsc, gnosis, celo). Contracts that were never verified return a structured {verified:false} miss, not an error. Feed the returned source into /api/solidity-scan for a heuristic pattern check.

Market data for tokenized real-world assets - tokenized stocks (Nvidia, Tesla, pre-IPO names), ETFs and commodities like gold - ranked by market cap or volume: price, market cap, 24h volume, 24h high/low and change, in your currency. Filter by type or a list of ids. Note these are the ONCHAIN wrappers' figures (what is tokenized and trading), not the underlying's exchange listing. Cached in-process for 60 seconds. Data provided by CoinGecko.

Deterministic preflight check for a proposed AI agent action - a tool call, payment, fetch, or write - before it executes. Evaluates up to four independent checks (prompt-injection scan on action text/untrusted text, URL/hostname validation, a bounded JSON-schema check on a payload, and a spend proposal against a spend mandate) and returns ALLOW, REVIEW, or BLOCK with stable reason codes plus a SHA-256 request/receipt hash pair.

Generate a text embedding vector using OpenAI text-embedding-3-large (3072 dimensions). Higher accuracy than the small model. Ideal for semantic search, RAG, and clustering. No API key needed; pay per call via x402. Text capped at 32k chars.

MCP server for AI agents: 48 tools (blockchain data, web scraping, ZK proofs, image generation, gift cards) payable per call in USDC on Base via x402. Send JSON-RPC tools/call requests.

Fetch a current third-party aggregated model-pricing snapshot from LiteLLM. Buyers should verify final pricing with each provider.

Historical price, market cap, and volume time series for a coin. Granularity is automatic: <=1 day = 5-min bars, 2-90 days = hourly, >90 days = daily. Days: 1, 7, 14, 30, 90, 180, 365, or "max". Returns aligned arrays of {time, price, marketCap, volume}. Data provided by CoinGecko.

Convert a PDF to clean markdown: headings, paragraphs, and bullets reconstructed from the text layer - ready to drop into a model's context. Body: {"url":"https://…/file.pdf"}.