Step 1 of autonomous self-registration - no API key required. Costs $0.01 USDC on Base (anti-spam fee, not a wallet-ownership proof). Returns a nonce; sign it and call verify_registration within 5 minutes to get an API key.
ConnectorNo auth
690,024 tools. Updated 2026-10-23 10:40
"Automatic Data Visualization Tool (No API Key Required)" matching MCP tools:
- Get a FactReason API key for yourself, instantly, with no human, no signup and no card. Returns a key carrying one-off trial credit that you can spend immediately on any tool. CALL THIS FIRST if you have no key, or as soon as any FactReason tool returns HTTP 402 Payment Required — then retry the original call with the key, passed as that tool's apiKey argument (or as an Authorization: Bearer header if your client can set one). The tool is free and is never metered. Supplying an email is optional and only affects whether trial credit is granted; a key is always issued either way.ConnectorNo auth
- Get a FactReason API key for yourself, instantly, with no human, no signup and no card. Returns a key carrying one-off trial credit that you can spend immediately on any tool. CALL THIS FIRST if you have no key, or as soon as any FactReason tool returns HTTP 402 Payment Required — then retry the original call with the key, passed as that tool's apiKey argument (or as an Authorization: Bearer header if your client can set one). The tool is free and is never metered. Supplying an email is optional and only affects whether trial credit is granted; a key is always issued either way.ConnectorNo auth
- Checks that the Strale API is reachable and the MCP server is running. Call this before a series of capability executions to verify connectivity, or when troubleshooting connection issues. Returns server status, version, tool count, capability count, solution count, and a timestamp. No API key required.ConnectorNo auth
- Create a new Fabric participant identity (node) and receive an API key + 500 free credits. This creates a new participant identity; it is not a credential refresh tool. Do not use this if the participant already has a node. Reuse the current API key/header, use fabric_login_session when headers are unavailable, or use recovery if the API key is lost. No authentication required. Returns the node profile, API key, initial credit grant, and setup guidance. After creation, immediately persist node.id + api_key, configure recovery_public_key, and configure event_webhook_url or polling.ConnectorNo auth
- Describe the versioned fair-value method and refusal philosophy. No API key required. Use it to interpret Sorqen numbers; use list_fair_values for current data.ConnectorNo auth
Matching MCP Servers
- AlicenseNot gradedqualityCmaintenanceEnables free web searches using DuckDuckGo results without requiring API keys or authentication, returning structured titles, URLs, and descriptions with a configurable result limit.6 npmMIT
- AlicenseNot gradedqualityCmaintenanceEnables creating interactive data visualizations from natural language queries using DuckDB for local databases or Databricks for enterprise data warehouses. Supports multiple chart types, CSV imports, SQL queries, and automatic statistical analysis through Claude Desktop.19MIT
Matching MCP Connectors
Brønnøysund Register Centre (BRREG) MCP — Norway's official business register. Enhetsregisteret…
Paid MCP server for EAN, UPC, and GTIN validation, normalization, correction, and batch analysis.
- Wraps POST /api/auth/rotate-key. Replace your API key if it may have leaked. Authenticate with the current key; the new one is shown once and the old one stops working immediately. No body is required.ConnectorDestructiveNo auth
- Get the URL of the Hey Anon page where the user logs in and creates an API key, plus the MCP config snippet where the key goes (X-API-Key header). Call this when a tool fails with "API key not set" or the user has no key yet. The key is never passed through the chat. No API key required.ConnectorNo auth
- Call this FIRST if you have no Verifly API key. Returns how Verifly works and how to get access with no human: pay-as-you-go email verification API, 100 free credits on self-registration, no monthly fee. No API key required to call this tool.ConnectorNo auth
- How to use CabalSpy: the keyless demo, where to get a free API key (1000 requests, no cost), pricing, documentation, and what the data covers. Call this first if you do not have a key yet, or if another tool returned an auth error or 'demo_limit_reached'.ConnectorNo auth
- Text in, SVG (or data-URL) QR out — Encode text= into a QR code as SVG (default) or format=dataurl PNG. Offline, no upstream. Built for agents putting payment links, IBANs or URLs onto a page. Required input: text. Priced $0.002 per call over x402 on Base; send a prepaid x-credit-token header for unlimited calls, or get 1 free call/day per tool. No API key required.ConnectorNo auth
- Batch generate limits Public metadata for `POST /passes/batch`. No authentication. Returns the hard row cap (100), sync mode, auth summary, and stable error codes. This path is on the site host (`https://passfa.st/api`), not `https://api.passfa.st/functions/v1`. MCP tool: `getBatchGenerateLimits`. Maps to OpenAPI operationId `getBatchGenerateLimits` — GET /passes/batch. Public endpoint — no API key required. Same PassFast HTTP API, billing, and rate limits. Do not invent other paths.ConnectorNo auth
- Liveness check for the OptionsBell MCP server. No API key required.ConnectorNo auth
- Create a free Commit API key instantly — no browser required. When you've hit the daily free query limit (or just want faster access), call this tool with your email to get an API key returned directly in the chat. The key lifts the rate limit to 200 audits/day and enables package monitoring (weekly alerts when your dependencies get riskier). After creating the key, configure your MCP client to pass it: Authorization: Bearer sk_commit_<your-key> Example: get_api_key({ email: "dev@company.com" }) One key per email. 3 keys per IP per day (anti-abuse).ConnectorNo auth
- Register your TRON address as an agent on agent.merx.exchange. Required ONCE before using request_payment, create_invoice, watch_address, agent_status, or any other agent payment tool. Pass the TRON address you want to use as the on-chain identity for this API key. Idempotent — calling twice with the same key returns the existing registration. Auth required (API key).ConnectorNo auth
- Register a new AI agent account with LQWD. Returns an API key and, when you supply a Lightning node's pubkey + node_uri, a one-time inbound channel on mainnet as part of the tier-1 faucet grant. Always free; no authentication required — this tool is how you GET your API key. To receive an inbound channel from LQWD, pass `pubkey` AND `node_uri` together.ConnectorDestructiveNo auth
- Onboard to the Quantustik API/MCP: anonymous access and quotas. No API key is needed — every tool is callable right now under an anonymous per-IP hourly cap. Returns the live keyless/free-key request quotas (pulled live from server config) plus the optional key-issuance URL and auth header format. Pure informational — no auth required to call it.ConnectorNo auth
- Optional wallet login/register step 1 (not required for trading with an existing API key). POST /api/getChallenge with a wallet address (login). Returns challenge text and isNewUser. Step 2: sign the challenge with the wallet outside MCP. Step 3: quote_trade_logon. No API key required.ConnectorNo auth
- SAFE ZERO-SETUP DEMO. Call this tool twice with the same id to see ONCE suppress the second execution. Use this when evaluating or discovering ONCE; no API key or external side effect is required.ConnectorNo auth
- Free, no API key required. Describes the US WARN Act layoff dataset: what a WARN notice is, which states are covered, how many notices and workers, per-state freshness, known coverage gaps, the schema of a record, and how to obtain an API key. Returns no records. Call this before search_layoff_notices to decide whether the data is useful.ConnectorNo auth
- Translate up to 6K chars to any language — LLM-quality translation as a pay-per-call primitive: send text= (up to 6K characters) and to= any language, get only the translation back — no notes, no wrapper prose, safe to pipe straight into the next step. Priced by length: $0.03 to 2,000 characters, $0.08 above — the 402 challenge quotes the price for the text you sent. No API key or subscription. Built for agents localizing content, parsing foreign-language sources, or serving multilingual users. Required input: text. Priced $0.03 per call over x402 on Base; send a prepaid x-credit-token header for unlimited calls (no free tier on this tool). No API key required.ConnectorNo auth