Execution cost estimate in basis points from supplied spread, fees, participation and impact assumptions. No trade execution or live order book. Idempotency-Key required.

Buy a prepaid API code for one GPT model and a token budget

Check a SHA-256 against a Securaw/TimeChain2 event. Reports registry checks and direct-file Bitcoin proof separately, with downloadable proof when available. Missing events and mismatches are billable results. Pending/unavailable is NOT Bitcoin confirmed. Legacy receipts without direct-file proofs are explicitly identified. No arbitrary-chain verification. Idempotency-Key required.

Compare 2 or 3 annualized volatility scenarios for a single exposure using Monte Carlo VaR. 0.50 USDC total. All other parameters, seed and path count stay identical. Returns each VaR, difference from the first scenario, original audit and replay proof. Supply base parameters and distinct sigmas. No live prices or correlated portfolio model. Automatic delivery, 30-minute SLA. Idempotency-Key required.

Register a file SHA-256 with Securaw/TimeChain2 and receive a downloadable OpenTimestamps proof directly binding its original bytes. ZIP includes .ots, metadata and independent-verification instructions. Hash only; no file upload. Initial receipt is NOT Bitcoin confirmed. Check the status link for later anchoring; no guaranteed deadline, authorship or content-truth certification. Idempotency-Key required.

Buy an admin-issued prepaid API code for one GPT model and a token budget

Verify a CryptoVar Black-Scholes VaR artifact by replaying its parameters, result and audit proof. 0.10 USDC. Returns valid true/false and the expected SHA-256 proof. An invalid artifact is a completed verification, not a service failure. CryptoVar artifacts only; no certification of model assumptions or future losses. Automatic delivery, 30-minute SLA. Idempotency-Key required.

Seeded single-exposure Monte Carlo VaR from supplied assumptions, with original CryptoVar audit artifact. No live prices or portfolio aggregation. Idempotency-Key required.

ProofRun - independent, bounded HTTP acceptance checks for agent-built deployments. $0.01 USDC for up to five owner-authorized HTTPS GET checks. Status, exact text and scalar JSON assertions; UTC observations, body hashes and private seven-day reports. Not security, visual or full-application certification.

CryptoVar risk_asset: single long spot exposure, BTC/ETH/SOL, 90 daily Kraken returns, seeded Monte Carlo VaR and replay artifact. 0.25 USDC. Idempotency-Key header required. No Bitcoin anchoring included.

SEC Form 4 insider trading for one US stock ticker, for trading agents (Coinbase for Agents / x402 market data). Every insider buy/sell/grant/gift in the window: name, role, date, transaction code, shares, price, shares owned after, filing url, plus open-market buy vs sell counts and dollar totals. Facts only - not a signal. Source: SEC EDGAR. ?ticker=AAPL&days=1-365 (default 90)&limit=1-25.

Convert PDF to text for AI agents - pass any public PDF URL, get the full extracted plain text in one call. pdftotext / convertpdftotext / pdf to text converter / extract text from PDF / read a PDF / parse PDF documents, papers, SEC filings, reports, invoices, manuals. Up to 25MB and 500k chars, with page count and a likely_scanned flag (text-based PDFs only, no OCR). No API key, no account. ?url=<public PDF url>. Free live sample: /pdf/example.

Track one agent service over time - the full day-by-day history of any x402 listing or MCP server: price changes, paying customers, call volume, installs, first and last seen. See what a listing like yours earns, watch a competitor grow or die. From daily whole-market snapshots the live catalogs don't keep. ?id=<x402 resource URL or MCP registry name> (find ids via /find, free). Market overview: /market/pulse $0.005.

Translate text for AI agents - POST any text up to 2,000 chars with a target language, get clean JSON back: the detected source language + the full translation, never prose. Any language pair - Spanish, French, German, Japanese, Chinese, Korean, Arabic, Hindi, Portuguese, English - source auto-detected when omitted. Translation API, language translation, localize, i18n. No API key, no account. POST {text, target_lang, source_lang?}. Free sample: /translate/example.

Is this X/Twitter account real? Bot check + verdict for AI agents - pass a handle, get an AI read (real_person/organization/likely_bot/parody_or_fan/inactive/unclear) with confidence, known-for, recent themes, red flags, plus non-LLM stats: account age, posts/week, avg likes/views, reply share. Influencer vetting, KOL check, lead qualification, verify an account before trusting it. ?username=elonmusk.

Monitor X/Twitter for changes - pass a search query and (optionally) a cursor from your last check, get back ONLY what's new since then, plus an AI change summary. Cursor-based so an agent never re-reads the same tweets. Brand monitoring, keyword alerts, competitor tracking. ?query=<advanced search>&since=<ISO timestamp or tweet id>. First call (no since) returns a baseline of the latest 20 + a cursor to pass next time.

Ask a question about any public PDF and get a cited answer - pass a PDF URL and a plain-language question; returns the answer, confidence, verbatim supporting quotes with page numbers, or not_found. PDF question answering, document QA, read a filing/paper/manual/contract for me, extract a fact from a PDF. Text-based PDFs up to 25MB (no OCR). Full text instead: /pdf/text $0.01.

One-call US stock ticker brief for trading agents (Coinbase for Agents / x402 market data): X/Twitter activity (24h), SEC Form 4 insider activity (90d), and the latest 8-K filing - bundled from /x/ticker-pulse and /sec/insider. Each section fails independently so a partial answer beats none. Facts only - never a buy/sell/hold signal or price target. ?ticker=NVDA.

Read any web page as clean text + markdown for AI agents. Give a URL, get back the page title, readable markdown, and plain text — the readable content extracted from the HTML. Pay-per-call in USDC via x402 — no signup, no API key. Use for letting an agent read pages, fetch articles/docs it can't access, scrape content, and feed RAG.

Space Markets Index (SMI) by SMX / Space Markets: orbital launch activity from public data. Weekly 2026 launch series, per-launch records (rocket, mission, payloads, mass status) and SMI prints, as small JSON. Each read costs $0.01 test USDC via x402 on Base Sepolia (testnet). Data: GCAT (J. McDowell, planet4589.org), CC BY 4.0, modified by Space Markets. Not affiliated with or endorsed by SpaceX. Data only, not advice. Free: /smi/latest