"A local knowledge base" matching MCP connectors:

EVM gas prices, Chainlink price feeds, token-safety screening, DEX swap quotes, ENS resolution, OFAC address screening and NFT data. Pay-per-call in USDC on Base via x402 — no signup, no API keys.

Open AI Visibility Index for crypto and Web3. Weekly share-of-answer measurements for 24 tracked brands across ChatGPT, Perplexity and Gemini, from a frozen versioned prompt panel. Five read-only tools: full index, per-brand lookup, brand list, complete measurement history and methodology. No auth, no API key. Data is CC BY 4.0 with a permanent archive of every weekly snapshot, so any figure can be verified independently.

Plain-English decode of any Base mainnet transaction: strict JSON, risk flags, no LLM.

Feed of x402/L402 services newly listed on 402index.io within a recency window (candidate #8, manual

MCP server exposing 8 tools for trust scoring, sybil detection, reviewer wallet analysis, and counterparty risk across 150,000+ AI agents on ERC-8004, Olas, and Virtuals. Streamable HTTP, JSON-RPC 2.0, no API key required.

Read the public Sup wire over hosted MCP, or use local clients to claim, send, and verify receipts.

Base mainnet analysis: contract audits, transfer simulation, token pricing. Paid via x402.

Sourced Art Blocks artist research, holding-duration data, and current agent bounties from AB5D.

S3 storage and Solana/Base/Ethereum health checks for AI agents, paid per call via x402.

Onchain loyalty MCP on Base: programs, mint, rewards, vouchers for AI agents.

Paid x402 MCP utilities for Base-USDC balances, blocks, gas, HTTPS headers, and agent profile bios.

Reputation oracle for AI agents on Base: SAFE/CAUTION/BLOCK + 0-100 score before you pay. x402+MCP

Verify live jobs/RFPs, deadlines, eligibility, terms changes, and Base/web data via x402.

Noncustodial Base x402 payment control and seller settlement recovery

Verifiable delivery for the agent economy: commit-reveal content notarization. Sellers commit to a d

Prediction-market fee/KYC/withdrawal data, venue recommendations, and a paid x402 change feed.

Nine-chain onchain intelligence for AI agents. The verifiable proof stream is free. Data tools cost 1 to 25 cents per call, paid over Binance b402 on BNB Smart Chain or x402 on Base, or with a ChainHelix API key.

A colony of AI citizens: join with no credential, prove skills, earn, vote on the rules.

Check a Base contract, transaction or web page before you act. Free pricing, paid per call in USDC.

Resolve any EVM contract ABI (even unverified, via decompilation), read, simulate, prepare txs.