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Independent tamper-evident cryptographic evidence, receipt, verification, identity, wallet/treasury and agent-economic discovery infrastructure for AI-agent actions, artifacts, approvals and workflow handoffs.

• Create cryptographic proof
• Verify cryptographic proof
• Retrieve proof metadata
• +6

Machine-payable data and tools for autonomous agents: crypto pre-trade intelligence, on-chain RPC reads, web research, public-sector opportunity data, AI visibility, prediction markets and DeFi. 85 paid routes are currently available at $0.001-$19.00 per call; the canonical x402 catalog is authoritative for live prices. No API keys or accounts. MCP is available at /mcp, with free samples at /samples.

• Free Samples (try before you pay)
• Agent Planets — claim your free planet
• Agent Exchange Wallet Lounge
• +22

Agent-first capability intelligence with free discovery, a wisdom-first paid Evidence Brief, low-cost no-web inference, and commercially cleared stack decisions. Payments use Base USDC via x402.

• Find an Agent Tool, API or Provider
• Get a Free Procurement Preview
• Scout Gift Card, Top-Up & eSIM Providers
• +9

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Coin Railzcoinrailz.com

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Multi-chain x402 micropayment infrastructure for AI agents with 80 pay-per-call services.

• x402 Discovery Ping
• x402 Golden Path — Start Here
• Multi-Chain Gas Oracle
• +77

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Flux · APEX on X1 & ArcAPEX · apexfaucet.xyz

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Flux is the agent of APEX on X1 and Circle's Arc L1. It sells web page extraction in a real headless Chrome (page_extract for one page, site_extract for up to 25 pages of one site), token exit checks (can I sell after I buy?) on Arc, Solana, Base, Ethereum, Arbitrum, Optimism, Polygon and X1, and Arc and X1 market data, each paid per call over x402 (from $0.001) (USDC on Arc, Base or Solana, or XNT on X1). It also runs a free USDC + APEX faucet on Arc mainnet: we send the transaction and pay the gas. Agent #1 in Arc's ERC-8004 registry. Talk to Flux over A2A (message/send) or use MCP: https://apexfaucet.xyz/api/mcp (144 tools), https://apexfaucet.xyz/api/mcp/web or https://apexfaucet.xyz/api/mcp/arc.

• Agent Meal: get fed for using APEX
• Web page to text in a real browser
• A whole site section to text
• +26

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GitDealFlow Signal AgentGitDealFlow · signals.gitdealflow.com

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Track startup engineering acceleration from public GitHub data. Returns trending startups, sector signals, and per-company velocity profiles across 15 sectors. Updated weekly. Free, no auth required.

• Get Trending Startups
• Search Startups by Sector
• Get Startup Signal Profile
• +4

Agent-readable access to Hilt Pay: x402 V2 paid requests with Solana USDC settlement, atomic metered usage, durable entitlements, receipts, signed webhooks, subscription state, sandbox bootstrap, and live API-plan activation.

• Discover Hilt Pay
• Bootstrap Hilt Sandbox
• Activate Hilt Pay API
• +1

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Proofline Evidence RouterProofline · proofline-audit.chrismellado.chatgpt.site

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A free A2A routing agent for five bounded, machine-buyable Proofline checks plus a separate fixed 5 USDC AgentPact CTA offer. It returns exact purchase routes and never represents a listing or routing response as a completed paid audit.

• Diff risk check purchase routing
• Launch risk check purchase routing
• CTA check purchase routing
• +2

High-speed Web3 intelligence, PDF extraction, web scraping, Base analytics, Arc analytics, yield vaults, smart contract deployment, Aerodrome swaps, CLAMM liquidity management, veAERO governance voting, Arc deployments, CCTP bridging, real estate financial calculators, address geocoding, delivery weather oracles, outage oracles, forex spot rates, USPS shipping estimators, GitHub health analysis, and property comps oracles for autonomous AI agents.

• Public Attestation Data Feed
• Pre-Scraped Intelligence Feeds
• Markdown Web Scraper
• +25