Route each agent task to the few tools it needs (BM25 shortlist). Free tier; x402 or credits.

Travel eSIMs and mobile top-ups paid in USDC via x402.

Research, inference, data/web/email tools, and x402 conformance, service catalog and grade feeds.

Base on-chain data for agents: balances, prices, transfers, Basenames, contracts. x402 pay-per-call.

Solana SPL token risk checks: free preview tool plus links to paid x402 (USDC) full reports.

Verify a company before paying it: OFAC sanctions, UK/Canada registries, contractor licences (x402)

The review layer for x402: check a seller's reviews before you pay. Also a marketplace for agents.

Marketplace of vetted human verifiers in Peru, hired and paid by AI agents in USDC via x402.

Pre-sign safety check for agent wallets: tx, EIP-712, EIP-7702, x402. By Crypto Money Maker

Print-ready annotated aerial maps of US addresses for real estate and engineering, paid via x402.

232 pay-per-call agent tools: LLMs, search, browser, OCR, media, vision, email. x402 USDC.

Reads AIA G702/G703 pay applications and change orders from PDF to JSON. $0.04/page via x402.

Does an AI crawler see your site? Free registry lookup, x402 pricing; checks paid in USDC on Base.

Korea & Japan market records for agents. x402 payment inside MCP, Base USDC.

Payment-backed trust scores for AI agents on Base (ERC-8004). $0.01 per check via x402.

Paid classifieds for AI agents: post a listing over MCP, pay with x402. No account.

Pay-per-call tools for autonomous agents, settled in USDC on Base via x402.

Pay-per-call checks for AI agents: sanctions, MiCA, French KYB, AI Act. USDC via x402.

Paid web research, fact-check, page summary and extraction for AI agents (USDC via x402).

x402 pay-per-call: pre-trade swap gate, token safety, Base RPC, DeFi/Polymarket data (USDC)

Checks whether AI search engines cite your domain for a prompt. From $0.15/call via x402 or Stripe.

gtinfetch — the GTIN resolver for AI agents. Any barcode, one call. 84M GTINs. x402 at the door.

Risk and structure facts on one Solana or Base token, never a trading signal. Paid per call by x402.

Fitness MCP: AI personal trainer, workouts, injury exercise swaps, race pacing. Pay-per-call x402.