"Accessing the OpenAI API" matching MCP servers:

Eight crypto and DeFi data tools for AI agents: prices, gas, one ParaSwap route quote, GoPlus token security and top-holder samples, DefiLlama yields, Hyperliquid/dYdX funding, and observed wallet balances. Inspect prices free; pay 0.001–0.008 USDC per call on Base through x402. No API key or subscription.

Non-custodial crypto swaps for AI agents: Solana (Jupiter) + 7 EVM chains (KyberSwap), 1288+ assets, cross-chain routing, priority-fee oracle, Hyperliquid perps. Returns unsigned transactions — your wallet signs, no API key, no KYC. Hosted at https://swaptitan.net/mcp

Enables AI assistants to query the Canton Network blockchain explorer through the CC Explorer Pro API. It provides tools for accessing ledger updates, governance votes, validator information, and network consensus data.

Implements the Model Context Protocol to allow AI models to access and interact with blockchain data, including reading contract states, retrieving events, and accessing transaction information across various networks.

Enables fetching, viewing, and saving NFT data from the Origin Forge API, including retrieving random NFTs, accessing their attributes, color palettes, images, and saving SVG/JSON files locally.

An MCP server that fetches on-chain blockchain data via the Ankr API, allowing LLMs to retrieve token balances for wallet addresses on specific networks.

Enables interaction with the Morpho GraphQL API, providing tools for accessing market data, vaults, positions, and transactions through a Model Context Protocol (MCP) server.

Enables agents to access live DeFi, social intelligence, risk, and API documentation tools with a caller-supplied API key.

Free DEX aggregator API that returns executable swap calldata across 46 EVM chains. No API key required. Single GET request returns ready-to-sign transactions for any token pair.

MCP server for cross-chain bridging, enabling AI agents to find routes, estimate costs, check risks, execute transfers, and track status across blockchains.

Provides access to NFTGo's Developer API for retrieving NFT collection details, asset information, market data, wallet information, and search capabilities on the Ethereum blockchain.

A Model Context Protocol server implementation that provides endpoints for wallet-based authentication, cluster management, and name registration services.

Provides tools for interacting with the Alpaca Trading API, enabling trading operations like getting account information, placing/canceling orders, listing positions, and accessing market data.

OpenAI-compatible inference broker that routes AI requests to the cheapest qualifying model and settles payments per token in USDC on Base L2 via x402 micropayments.

43 x402-enabled API tools — DeFi, wallet security, AI/ML, developer tools, SEO. Pay-per-call USDC on Base via x402 protocol.

Bitcoin data for AI agents. Pay-per-query via x402 micropayments. No API keys. No subscriptions. No tokens.

Enables interaction with Ethereum-compatible smart contracts through their ABI, allowing both read operations (querying state) and write operations (executing transactions) dynamically based on the contract's interface.

Allows LLM agents and MCP clients to analyze blockchain data including wallet balances, token information, and transaction history across EVM and Solana chains through the Dune API.

An MCP server that enables LLMs to query DAOs, proposals, and voting data from Tally's blockchain governance API across multiple networks.

55+ pay-per-call tools for AI agents over MCP: live telemetry, blockchain/on-chain checks, environmental, transit, finance, and network utilities. No API key or signup — agents pay per request with x402 USDC micropayments (Base and Solana).

Enables AI assistants to query blockchain chain data, including chain details, RPC endpoints, and chain relationships, through a Model Context Protocol server.

Enables AI agents to interact with the AI Network blockchain by managing accounts, submitting transactions, and reading database values. It supports registering Hyper Agents and accessing a Layer 2 DAG-based shared agent memory system based on staking status.

Enables querying indexed blockchain data via subgraph GraphQL queries, part of the Pipeworx MCP gateway.

Enables AI agents to query subscription rewards and tokenized stock claim data from forwarded receipt emails, without accessing inbox or private keys.

MCP server for decoding and inspecting x402 payment headers and requests. Remote endpoint: https://lumenworks-x402-decoder.onrender.com/mcp

A Node.js Express server that provides access to CoinGecko's cryptocurrency data through a comprehensive API interface, supporting both free and Pro APIs with automatic fallback functionality.

Enables scanning Solidity smart contracts for 13 vulnerability classes using pattern-based analysis; provides full audit, quick scan, gas analysis, and detector catalog through MCP tools.

A comprehensive MCP server providing unified access to over 144 tools for lending, trading, and staking across six major DeFi protocols on the Stacks Bitcoin Layer 2. It enables AI agents to perform complex blockchain operations and interact with the DeFi ecosystem using natural language commands.

Enables interaction with blockchain networks through the Rosetta API standard for Internet Computer Protocol (ICP). Supports operations like account balance queries, transaction construction and submission, block retrieval, and network status checks.

MCP server for accessing crypto token data from the Artemis API, including price, fees, revenue, asset classifications, and market cap rankings.