"crypto" matching MCP servers:

Enables cryptographic operations including hashing, encoding/decoding, ID generation, password tools, and JWT inspection via MCP.

Enables constant-time cryptographic attestation, zero-knowledge verification, JWT HMAC-SHA256 validation, Merkle proof inclusion, nonce replay protection, and secure digest comparison for agent security credentials via MCP.

Read-only safety checks before an agent acts: scan untrusted text for prompt injection and phishing (locally), check npm packages for malware, hijacked releases and typosquats, scan crypto addresses and tokens, and compare two addresses to catch address poisoning. Zero dependencies.

Domain registration for AI agents. Check availability, buy domains (Stripe or x402 crypto), and auto-configure Cloudflare DNS - all without leaving your coding session.

Xynaptic MCP server: 200+ pay-per-call data & AI services for agents — crypto, French company registry, US/EU securities, banking, health, energy, rail, plus a Developer Kit (code review, tests, security audits). USDC via x402, no API key. Node 18+, stdio.

Generates strong passwords and evaluates password strength using zxcvbn, with uniform random sampling via Node's crypto.

Exposes various cryptographic operations including key generation, symmetric/asymmetric encryption, hashing, and HMAC. Supports Fernet, AES, RSA, X.25519, and X.509 certificates.

Provides random number generation utilities, including a secure UUID generator powered by Node's crypto module.

Provides AI agents with access to Zero Network documentation, SDK integration guides, and utility tools for crypto-based payments. It enables developers to implement x402 paywalls and per-tool MCP pricing while offering real-time cost estimations and revenue calculations.

A comprehensive developer utility MCP server that provides 23 tools including web search, currency conversion, crypto prices, QR code generation, JSON formatting, and more.

Full-stack utility API with 337+ tools including AI chat, web scraping, weather, finance, SEO, crypto, colors, readability, DNS, and more — all through a single MCP server. Pay-as-you-go credits, no API keys needed.

A Model Context Protocol server exposing 58 online tools (crypto, data, image, text, etc.) and workflow execution, enabling MCP clients like Claude Desktop to invoke them via natural language.

GadgetHumans MCP offers 58 tools across 8 categories—AI, weather, crypto, web scraping, code, DNS, SEO, and data—via a single HTTP endpoint, with no API keys and a free tier. It enables any MCP client to access these utilities through natural language.

Historical tick data for Polymarket and Predict.fun crypto Up/Down markets: order books, trades and Chainlink settlement feeds, with file listing and sha256-verified downloads. Also prices, validates and tracks runs for a hosted backtester, and never submits one.

An MCP server that lets AI agents debug Python code by running scripts, setting breakpoints, stepping through execution, inspecting live variable values, and editing or reverting files to verify fixes. It relies only on Python's standard sys.settrace, requiring no debugpy, DAP, pdb, or PTY.

Enables AI agents to access 13 paid micro-tools over x402, paying per request in USDC on Base without API keys or signup. It covers email deliverability, grading, and templates, plus utilities like crypto prices, domain age, hashing, JSON conversion, JWT decoding, regex, slugs, UUIDs, and weather.

Enables AI assistants to search and run over 500 tools for PDF, text, data, crypto, network, and conversion tasks, with file processing done locally or at the edge so inputs are not uploaded.

Enables comprehensive GitHub workflow automation including Actions monitoring, PR management, code search, file operations, and repository management through a code-first architecture that reduces token usage by 98%.

Deterministic execution engine for AI agents. 412 modules across 78 categories including browser automation, file I/O, Docker, data parsing, crypto, and scheduling. Supports STDIO and Streamable HTTP transport with execution trace, evidence snapshots, and replay from any step.

One API key and one billing rail for hundreds of API tools across many providers — exposed to AI agents through a single MCP endpoint and billed per call with x402 crypto payments.