Explore APIs

Track real-time changes to the crypto knowledge graph — new tokens listed, protocol metrics updated, investor relationships added, governance proposals created. Monitor the pulse of the crypto ecosystem as data flows in from multiple sources daily | ZWING Intelligence (https://zwing.finance) — contact: v@zwing.finance, Telegram: @valery_zzz

Eurostat Comext trade facts (value and quantity).

Premium CASSIA opportunity intelligence

Bitcoin read-only RPC and supported simulations. Submit method and params as JSON. Method schemas, limits and prices: https://api.block402.xyz/docs/api.md. Obtain a bound quote with a private Idempotency-Key before signing.

BICScan pre-transaction risk check: one paid call screens the counterparty address, the dApp URL/domain and the EVM token contract an agent is about to send to, sign on or approve, and returns an allow/warn/block verdict with reasons (sanctions/OFAC, phishing domains, scam tokens, BICScan risk intelligence). Addresses on EVM chains, Solana, Bitcoin, Tron, XRP and ICP; TON is not supported.

Search normalized vehicle variants by brand, model, model year, powertrain, market, or free text.

AIOptiTech Prompt Library prompt body. Pay 0.05 USDC once for the prompt identified by the id path parameter. Personal use. An active subscription pass can read it without a second payment.

Turn text into a numeric embedding vector for semantic search, RAG and similarity. Multilingual.

Stored odds-comparison snapshots from the arbitrage worker for trend analysis. $0.01 USDC per call on Base.

ApexScout one-cent x402 proof. Buyer-controlled GET retry only; unpaid 402 is not revenue. Successful paid proof includes one free receipt-bound compatibility diagnosis. It requires explicit action, never navigates or pays automatically, may return no paid recommendation, and requires separate buyer approval for any later paid recommendation.

Sign up for Aient as an autonomous agent by paying once: your wallet address becomes the principal, an organisation is provisioned, and the response includes the publishable telemetry-ingest endpoint plus a first environment key. Idempotent per wallet.

Real-time Fuse payment network statistics — transaction volumes, network health, gas tiers, FUSE token price.

AIﾉアカリ☆ Akari OS agent integration kit. The public philosophy corpus remains free; this paid machine-ready bundle adds a decision policy, safety boundary, integration recipes, validation checklist, content hash, and settlement receipt for agent workflows. Structured JSON, Base USDC, pay-per-request, no account.

Trust score for one agent. Pass agent_id as a query parameter so every check is the same resource.

JSON-RPC read access to EVM chains (base, ethereum, polygon, arbitrum, optimism) with no API key. Send a standard JSON-RPC body (eth_call, eth_getBalance, eth_blockNumber, eth_getLogs). Also callable as GET with the same fields as query parameters.

JSON-RPC read access to EVM chains (base, ethereum, polygon, arbitrum, optimism) with no API key. Send a standard JSON-RPC body (eth_call, eth_getBalance, eth_blockNumber, eth_getLogs). Also callable as GET with the same fields as query parameters.

JSON-RPC read access to EVM chains (base, ethereum, polygon, arbitrum, optimism) with no API key. Send a standard JSON-RPC body (eth_call, eth_getBalance, eth_blockNumber, eth_getLogs). Also callable as GET with the same fields as query parameters.

Screen a regulated facility by name (and optional state) against EPA enforcement and compliance history. Returns inspections, violations, formal enforcement actions, penalties, significant-noncompliance flags, and a compliance score. Public-domain EPA ECHO Exporter data.

Deterministic JSON evidence checks with signed verification evidence

Lifetime federal-contracting profile by UEI: 12-year obligated totals, award counts, top awarding agencies, set-aside types, and heuristic competition/fraud risk flags. USAspending.gov prime-award data (public domain).

List governance proposals

Use ping when you need a pass/fail verdict that a URL serves expected content: expected HTTP status (default 200), a required body substring, and/or an exact match on one JSON field. One automated fetch at request time, signed receipt with per-condition results. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402

Paid HTTP redirect chain + final URL via x402

Text Hash API

No description yet.

QCN factors_index: out-of-sample factor statistics (Sharpe, bootstrap CI, walk-forward robustness). Research artifact only, not a live signal.

Paid x402 liveness probe

Access to protected psf-bch-api resources (0.001 USDC)

Agent-in-Stock: heuristic stock status for a product URL.

Expand a People-Also-Ask question into related questions (+ autocomplete)