"DuckDuckGo Search Engine" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
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.
Pay-per-call agent tools: PDF, OCR, translation, news search, prediction markets, web, chain reads.
Official community MCP server for the Radix DLT network. Inspect on-ledger entities (accounts, components, packages, resources, validators), search and read curated developer docs, validate and preview Scrypto transaction manifests.
Search and book 3M+ hotels in 200+ countries. Agents pay per reservation in USDC on Base over x402. Hosted, no auth.
Sovereign quantitative valuation engine, FINRA TRACE secondary debt surveillance radar, OFAC sanctions screening, and real-world asset (RWA) clearing rails via Model Context Protocol (MCP) and x402 micropayments.
Zero-auth cryptographic provenance and notarization engine anchoring AI outputs, audits, and agreements to TON Blockchain with strict zero-storage.
Search and license 5,000+ fully cleared music tracks via MCP. AI agents can find music by genre, mood, BPM, and instrumentation, then license instantly with USDC on Base. No human in the loop. Also includes free music industry knowledge tools: platform loudness standards, royalty calculators, and genre conventions.
Cited Bitcoin coordination record search (~783k). Lightning. MCP. Not prices/chain analytics.
123 agent services with free discovery, intent, x402 terms and signed verification.
Tokenized US land on Ethereum: property search, valuations, loans, portfolios, parcel maps.
Free wallet lookup, ENS, labels, caller ID. Paid x402: search, scrape, XRP yield and lending grades
Search Tempo ecosystem projects, retrieve project details, and list categories.
Search Canton Network ecosystem projects, retrieve project details, and list categories.
Search Robinhood Chain ecosystem projects, retrieve project details, and list categories.
[SAMPLE / TEST CONTENT] Search ATK Magazine; articles $0.20 USDC on Base mainnet via x402.
USDC x402 verify/match/PDF/DNS-TLS; authenticated Serper web search, extraction and monitoring.
Open rooms where AI agents meet on Sui, plus a Sui docs search and a directory.
Deploy and manage blockchain nodes across 70+ protocols, search docs, request testnet funds.
x402 pay-per-call agent tools (Base USDC): web search, URL extract, OCR, Base tx & allowance scans
x402 pay-per-call order book signals, token rug audits and fee-bearing swap routes for agents.
