DeFi Yield Finder — Best APY Across 100+ Protocols

Password Strength Checker — Entropy & Crack Time

Password strength evaluation API for AI agents. Score 0-100 with entropy bits, estimated crack time (brute force and dictionary), pattern detection, and actionable improvement tips. Tools: security_check_password. Use this for password policy enforcement, user registration validation, or security audits. Returns machine-readable strength data for automated decisions. Returns: {score, entropy, crackTime, tips[]}. No API key required — x402 micropayment $0.001/call on Base L2.

Fact Checker — Verify Claims with Web Evidence

AI-powered fact-checking API for AI agents. Verify any factual claim with web evidence: searches multiple sources, assesses credibility, provides supporting/contradicting URLs, and returns confidence level (confirmed/likely/unverified/false). Tools: research_check_fact. Use this before repeating claims, for content moderation, or building trustworthy AI systems. Essential for reducing hallucinations. IMPORTANT: For web search without fact assessment, use web_search_query. Returns: {verdict, confidence, sources[], evidence[]}. No API key required — x402 micropayment $0.005/call on Base L2.

Text Classifier — Topic Categories & Readability

Text classification API for AI agents. Classify text into topic categories with confidence scores, readability metrics (Flesch-Kincaid), and content type detection (article, review, email, code, etc.). Tools: text_classify_content. Use this for content routing, auto-tagging, spam detection, or organizing unstructured text. IMPORTANT: For sentiment analysis, use text_analyze_sentiment instead. Returns: {categories[], readability, contentType, confidence}. No API key required — x402 micropayment $0.005/call on Base L2.

Currency Converter — Fiat & Crypto Cross-Rates

Currency conversion API for AI agents. Convert between fiat currencies (ECB rates) and crypto (CoinGecko rates). Instant cross-rate lookup for USD, EUR, GBP, JPY, BTC, ETH, and 100+ currencies. Tools: finance_convert_currency. Use this for price normalization, international pricing, or cross-currency calculations. Supports both fiat-to-fiat and fiat-to-crypto conversions. Returns: {result, rate, from, to, timestamp}. No API key required — x402 micropayment $0.001/call on Base L2.

Email Deliverability Audit — SPF/DKIM/DMARC Check

Email deliverability audit API for AI agents. Analyze any domain's email authentication: SPF record validation, DKIM selector check, DMARC policy analysis, MX record health, and composite deliverability score 0-100 with prioritized fix recommendations. Tools: email_audit_deliverability. Use this when auditing email infrastructure, diagnosing delivery issues, or checking domain reputation before sending campaigns. IMPORTANT: This checks the DOMAIN's setup — for individual email validation, use email_verify_address instead. Returns: {score, spf, dkim, dmarc, mx, recommendations[]}. No API key required — x402 micropayment $0.005/call on Base L2.

PII Detector — Find Emails, SSNs, Credit Cards in Text

PII (Personally Identifiable Information) detection API for AI agents. Scan any text for sensitive data: email addresses, phone numbers, SSNs, credit card numbers, IP addresses, physical addresses, and names. Risk scoring and redaction-ready output. Tools: compliance_detect_pii. Use this BEFORE logging, storing, or transmitting text that might contain personal data. Essential for GDPR/CCPA compliance, data sanitization, and privacy-by-design. IMPORTANT: For website GDPR compliance, use compliance_scan_gdpr. Returns: {piiFound[], riskLevel, redacted}. No API key required — x402 micropayment $0.005/call on Base L2.

NodeAPI

Machine-native GIS processing API for AI agents and developers. Convert, reproject, validate, repair, buffer, clip, dissolve, and tile vector geodata across 25 endpoints. Pay-per-use USDC on Solana Mainnet ($0.01/op). No accounts, no API keys. Remote MCP SSE.

astllm-mcp

An MCP server for efficient code indexing and symbol retrieval using tree-sitter AST parsing to fetch specific functions or classes without loading entire files. It significantly reduces AI token costs by providing O(1) byte-offset access to code components across multiple programming languages.

Openterms-mcp

Cryptographic proof of consent for AI agents. Sign before you act. Policy engine enforces spending caps, action whitelists, and escalation rules. Independently verifiable by anyone.

Aegis-ZK

On-chain trust verification for AI agent tools. Agents query skill attestations, audit levels, and risk scores before running third-party MCP servers, so you know what's safe before you execute.

Satoshidata Wallet Intelligence

Bitcoin wallet intelligence for AI agents: labels, risk signals, transactions, fees, and mempool.

HiveAgent — The Agentzon

498 MCP tools across 12 industry verticals. Marketplace, escrow, DeFi, legal, healthcare, insurance, construction, and trades. USDC payments on Base L2.