"Popular MCP tools commonly used by programmers" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Pay-per-call tools for AI agents, paid in USDC on Base or Solana. Web search, page and PDF reading, crypto news, Hyperliquid perps, market pulse, Chainlink price history, token checks, SEC filings, weather and more. Free calls every day, and a failed call costs nothing. Works with Tollkit Wallet.
360 pay-per-call APIs for AI agents over x402 and MPP, settled in USDC on Base ($0.001-$0.25 a call, no account or API key). DeFi yields and market data, 10-chain wallet reads, wallet and token risk signals, sanctions screening, SEC financials, email/domain and web intelligence, AI text extraction, and signed proofs. Every answer names its sources and carries an evidence hash; a paid call that is not delivered is credited back. Built and run by UnyKorn LLC.
232 pay-per-call AI APIs: crypto, DeFi, markets, official data, compliance and developer tools.
Check before money moves. Lorg Check tells an AI agent, or you, whether a token is a trap or an address is unsafe to pay, on Base and Ethereum. In live tests on new launches it blocked traps that GoPlus and Honeypot.is missed. Call check_token before buying or swapping into a token: it simulates a real buy and sell-back through the token’s own pool, reads what the creator can still do, who can pull the liquidity, and whether the creator was paid by a wallet behind earlier rugs. Call check_address before sending funds: sanctions, scam labels, EIP-7702 sweepers and address-poisoning look-alikes. Every answer is signed and says proceed, limit_exposure or do_not_proceed, with a one-line summary to show the user. Free key by GitHub sign-in, or connect with an API key.
Pay-per-call ($0.005-$0.03 USDC) market, on-chain, and prediction-market data API for AI agents and trading bots via x402 — no signup, no API key. Remote MCP server, 28 tools: token security (honeypot/liquidity/counterfeit checks), Hyperliquid oracle-gap risk, kimchi premium, funding APR, DEX slippage, Polymarket arbitrage/liquidity audits, Hyperliquid HIP-4 odds.
12 pay-per-call tools for AI agents: token prices and reports, wallet and contract risk, liquidity pools, gas cost estimates, FX and Bitcoin prices. Paid per call in USDC via x402; no API key.
58 pay-per-call tools for AI agents: balances, tokens, blocks, gas, transactions, receipts, nonces and logs on Base, Ethereum, Arbitrum, Optimism and Polygon, plus Bitcoin fees and addresses, Lightning invoices and ENS. USDC via x402.
175 agent tools: chain data, prices, sanctions, web, PDF. 25 free calls, then from $0.002.
Enterprise-grade L402 data vending engine and cryptographic notary hub for autonomous AI swarms. This engine provides the required "State-Anchored AI" data layer for EU AI Act Article 12 compliance, delivering cryptographically verifiable chain-of-custody for agent decisions without human intervention. Key Enterprise Capabilities: • EU AI Act Compliance Notary: Intercepts high-frequency agent ReAct loops and anchors cryptographic execution traces to the Bitcoin base layer via OpenTimestamps. • Autonomous Proof-of-Execution Escrow Oracle: Machine-native conditional micro-settlement for agent-to-agent delegation. Locks task bounties and validates RFC 6962 Merkle execution leaves before releasing payment preimages and collecting an automated 21-sat protocol toll. • Swarm Flight Recorder (Zero-Knowledge): Compresses thousands of agent thoughts into a single Merkle root. Enables selective-disclosure audit proofs to protect proprietary corporate IP and PII during regulatory reviews. • Inter-Swarm B2B Settlement: Provides a neutral, trustless settlement layer for competing corporate agents to negotiate, mutually sign, and notarize cross-enterprise contracts. • L402 Lightning Micropayments: Programmatic pay-per-query settlement in satoshis with zero API key requirements. Agents autonomously pay for their own notarization via X-L402-Batch-Size macroeconomic bundling. • Real-Time Data Grounding: Streams thermodynamic Bitcoin telemetry, Groth16 ZK-SNARK verification, and Nostr event attestation to prevent agent hallucination in financial contexts. Dual-licensed under AGPLv3 and Commercial Enterprise terms. Architected by Charles R. Strogish. Protocol Endpoints • GET /api/v1/cost — Pre-flight L402 pricing, dynamic tier discovery, and settlement asset options. • GET /api/v1/stratigraphy — Nostr-signed thermodynamic Bitcoin dataset. • GET /api/v1/stratigraphy/stream — Real-time telemetry event stream.
64 tools: balances, blocks, gas, txs and logs on 5 EVM chains, plus Bitcoin. 25 free calls.
13 tools: token prices, wallet and contract risk, liquidity pools, FX. 25 free calls.
A marketplace for AI agents. Tools and data for agents, on one MCP address. No account, no API key.
Agent MCP: 10 web tools, BTC/ETH/XMR/ZEC/TRON verification & risk, 80k+ books.
Uniswap/PancakeSwap/Aerodrome LP pools and price ranges ranked by net APR after impermanent loss
8,700 tokenized assets in 50+ countries — stocks, bonds, funds, stablecoins — by issuer and rights
Pay-per-call agent tools: PDF, OCR, translation, news search, prediction markets, web, chain reads.
Evaluate x402 V2 HTTP payment requirements against explicit recipient, asset, network and amount policies, with requested-resource binding checks. Returns pay, review or do_not_pay with explanations. Public offline tools require no account, wallet or API key. Does not sign, send payments or verify on-chain settlement. Documentation: https://settlens.com/mcp — Reproducible examples: https://settlens.com/blog/check-x402-payment-policy
Skavio Paid MCP v1.1.3 provides 18 tools for blockchain USDC payment verification, exact payment matching, PDF evidence, and DNS/TLS audits. Pay per call with x402 v2 using native USDC on Base or Solana. Additional company-authenticated AgentTools support web search, DeepSeek, PDF processing, OCR, invoice extraction, and transcription. The three standalone HTTP x402 endpoints remain Base-only.
Remote MCP server for crypto trading signals and the public ledger that scores them, losses included. Read tools: open signals, the signal ledger (matured wins and losses), signals cancelled by the BTC regime veto with the outcome they would have had, market snapshot and ticker for scanned Binance symbols, the scheduled BTC chart read, and news headlines. The public read tools work without a key. With a free API key from ribqa.com: your own bots and strategies, and rate-limited strategy backtests. No tool places, simulates or cancels an order. Free during beta.
Agent-native XRPL infrastructure: 19 paid MCP tools, x402 USDC on Base, non-custodial XRPL actions.
