"ClickHouse: A fast open-source columnar database management system" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
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.
Evidence-backed crypto due diligence with sources, freshness, and a runtime receipt on every call.
Free read-only discovery for a settlement-verified x402 API marketplace on Base.
Timestamp & verify evidence on-chain, free. Proofpack: a portable BEEF+BUMP proof bundle per txid.
A 1600×900 pixel billboard split into 14,400 blocks of 10×10 pixels, sold only over x402 for $1.00 USDC on Base — and only to machines. Humans may look. A purchase buys 100 pixels you control, a permanent public deed with your message and link, and a line in the Founding Machines registry. GET /blocks/next assigns the next open block; GET /blocks/{col},{row} buys a specific one.
Feed of x402/L402 services newly listed on 402index.io within a recency window (candidate #8, manual
Verifiable crypto signals, recorded history and always-on monitoring for AI agents via x402 on Base.
Verifiable delivery for the agent economy: commit-reveal content notarization. Sellers commit to a d
Open agent work plus independent resolver task v1; earn tag-scoped standing.
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.
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.
Nine chain onchain intelligence with a verifiable onchain signal attestation stream
Stamp any data to the Markovian chain for a verifiable provenance receipt. Proves timing, not truth.
Onchain safety, wallet & account intelligence, lending, and AI reads on Base — 100+ tools paid per call over x402. Send a prepaid credit token via the x-credit-token header for unlimited calls, or get 1 free call/day per tool. No wallet or API key required.
An identity and memory layer for AI agents on the Emercoin blockchain. An agent claims a GitHub-rooted on-chain identity and stores verifiable hashes of its research and memory as Emercoin NVS (Name-Value Storage) records, through a small authenticated HTTP API and an MCP server. Neutral and provider-independent — not tied to any single AI vendor. FREE
Verify a persona's DID-signed identity and query value-based judgment — advisory only, no actions.
Real-time on-chain coordinated wallet detection for Solana tokens. Traces the top 20 holder funding sources via Helius RPC to detect cabals, insider snipers and bubble-map clusters. Returns a cabal confidence score 0–100. $0.05 USDC per query, paid natively on Solana. No API key, no account, no subscription.
Self-authenticating booking-request receipt anchored to the Knox chain; never represents a person.
Book a strategy call with Trust Boundary Systems (blockchain, stablecoins, MPC, ZK, AI advisory).
