You get 5 free trial calls to spend anywhere in the catalog. No registration — any wallet that signs the trial challenge is the identity. No KYC. No credit card. Just curl and go.
It's one shared allowance, not 5 per endpoint: spend all 5 on one service or one call each on five. After that, pay per call with USDC to keep calling.
Prices and trial counts below are read live from the catalog; every call answers 402 with the exact amount first.
Search your agent's memory for stored facts, notes, or conversation history. The stickiest endpoint — agents come back 15.9× on average.
Search the x402 catalog for a capability instead of hardcoding an endpoint. Its own 402 says "payment-only — no free trial", so the trial count beside it is a lifetime usage counter, not an allowance you can spend: this is the one card here you cannot try free.
Real-time gas prices across Ethereum, Base, Arbitrum, and Optimism. Essential for any agent that submits transactions.
Scrape and extract clean text from any URL. Handles JavaScript rendering, paywalls, and CAPTCHAs automatically.
Persist text, notes, and structured data to agent memory. Combined with recall + find, forms the agent memory stack.
Current time, timezone conversion, date math, and timestamp formatting. Simple but needed constantly.
Live Polymarket prediction market data — prices, volumes, and event outcomes for thousands of markets.
Audit any ERC-20 token for honeypots, rug pulls, ownership concentration, and malicious code patterns.
Generate UUIDs (v1, v4, v7) for request tracing, idempotency keys, and distributed agent coordination.
Crypto Fear & Greed Index — current sentiment, historical trend, and classification. Niche but incredibly sticky (23.0 calls/user).
Pick any service in the catalog. Your first 5 calls are automatically free — the server counts them against your signed wallet, and the counter is shared across every endpoint you touch.
These are the same production APIs that paying agents use. No sandbox, no limited data — real responses.
No. Your first 5 calls are free after you sign a wallet — no KYC, no USDC deposit. The server identifies you by your signed wallet for trial tracking.
5 in total. One allowance per signed wallet, shared across the entire catalog — deliberately, so nobody can farm the whole directory for free. Spend all 5 on one service or one call each on five different ones; the counter is the same either way. Every trial response carries x-trial-remaining, so you always know where you stand.
You'll get an HTTP 402 Payment Required response with payment instructions. No registration is involved: a trial is a signed wallet, so send X-Wallet-Signature and X-Trial-Timestamp with the call to use one (see AGENTS.md for the exact string to sign).
Yes. Every endpoint returns the same production data whether you're on a free trial or paying. No degraded responses, no rate limits beyond the trial cap.
Most endpoints cost 0.5–1¢ (USDC) per call. Premium services (AI-powered endpoints) cost 2–5¢ per call. See full pricing at /api/services.
Yes. Use /api/services for the full JSON catalog, /.well-known/mcp.json for MCP tools manifest, or /llms.txt for an AI-readable listing.
No catch. The free tier exists because most agents discover value and convert to paid. The 0.22% conversion rate from trial to paid is the business model — we win when your agent finds an API worth paying for.
Sign a wallet you already hold for 5 free trial calls -- no registration. USDC spends across the whole catalog at each service's listed price.
Get Started →No registration: sign minia2a trial:<wallet>:<serviceId>:<unix_ts> with EIP-191 and send it as X-Wallet-Signature + X-Trial-Timestamp — register.html prints the curl.
Data from /api/stats — live as of August 2026.
minia2a.uk — the agent services marketplace.