"Free Graph and Network Visualization Tools (No API Key Required)" matching MCP tools:

• discovery_signup

  Disco

  Create a Disco account and get an API key. Provide an email address to start the signup flow. If email verification is required, returns {"status": "verification_required"} — the user will receive a 6-digit code by email, then call discovery_signup_verify to complete signup and receive the API key. The free tier (10 credits/month, unlimited public runs) is active immediately. No authentication required. Returns 409 if the email is already registered. Args: email: Email address for the new account. name: Display name (optional — defaults to email local part).

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• strale_ping

  Strale - 290+ API capabilities for AI agents

  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.

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• check_free_tier_status

  TensorFeed

  Check the caller IP's free premium-API trial quota. TensorFeed gives 100 free /api/premium/* calls per IP per 24h rolling window with no auth required. This tool returns used_today, remaining, and resets_at without consuming a quota slot. Use it before deciding whether to make a paid call versus waiting for the trial reset. No arguments.

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• mint_key

  linkedin

  Mint a free trial API key for this session, when you don't already have one. This tool only appears while the session has no API key configured -- once a key is set, it drops off the tool list, so seeing it here IS the signal that you need it. Takes no parameters. Minting is anonymous: it issues an API key, not a user account -- no signup, no email, no card, no identity attached. The key works immediately on the free tier, which stays the same small per-IP daily budget whether or not you mint. Minting does NOT authenticate the current session: the session stays un-keyed until the client reconnects with the returned key in its Authorization header, so the result explains how to persist the key, not how to keep going in this transcript. If you cannot edit the client config yourself, return the key and setup snippet to the user so they can paste it and reconnect. After minting, do not call this tool again -- configure the key at the transport layer and use the data tools once reconnected. Returns the key itself (shown once) plus setup instructions; it never returns platform data.

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• chieflab_signup_workspace

  ChiefLab

  USE WHEN the user has no ChiefLab API key yet and you've gotten a 401 / 'authentication required' error from any other tool. Agent-first signup: creates a new workspace and returns the API key inline as `apiKey`. PREFERRED flow: use your filesystem tools to write the apiKey into the user's MCP config (see mcpConfigSnippet for the patch shape), then ask the user to restart their runtime once. After restart, re-call the original tool. FALLBACK: if you can't write to the config file, surface the included deliveryUrl to the user — they click, see the key, paste it manually. URL expires in 1 hour, single-use, IP-rate-limited (5/IP/hr). No login form.

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• register_agent

  Conductor Relay MCP

  Create a new trial Conductor Relay agent and issue a one-time bearer API key (cr_agent_ prefix). The key is returned once — store it securely. No input or auth required.

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• dcf-valuation

  The Stall

  5-year Discounted Cash Flow model for any US public company. Fetches free cash flow history, consensus EPS growth, and WACC (CAPM), then projects 5 years of FCF, adds a Gordon Growth terminal value, subtracts net debt, and divides by diluted shares to produce intrinsic value per share vs current price. Returns margin of safety, upside/downside %, and full DCF schedule. No API key required.

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• mint_key

  x-twitter

  Mint a free trial API key for this session, when you don't already have one. This tool only appears while the session has no API key configured -- once a key is set, it drops off the tool list, so seeing it here IS the signal that you need it. Takes no parameters. Minting is anonymous: it issues an API key, not a user account -- no signup, no email, no card, no identity attached. The key works immediately on the free tier, which stays the same small per-IP daily budget whether or not you mint. Minting does NOT authenticate the current session: the session stays un-keyed until the client reconnects with the returned key in its Authorization header, so the result explains how to persist the key, not how to keep going in this transcript. If you cannot edit the client config yourself, return the key and setup snippet to the user so they can paste it and reconnect. After minting, do not call this tool again -- configure the key at the transport layer and use the data tools once reconnected. Returns the key itself (shown once) plus setup instructions; it never returns platform data.

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• mint_key

  reddit

  Mint a free trial API key for this session, when you don't already have one. This tool only appears while the session has no API key configured -- once a key is set, it drops off the tool list, so seeing it here IS the signal that you need it. Takes no parameters. Minting is anonymous: it issues an API key, not a user account -- no signup, no email, no card, no identity attached. The key works immediately on the free tier, which stays the same small per-IP daily budget whether or not you mint. Minting does NOT authenticate the current session: the session stays un-keyed until the client reconnects with the returned key in its Authorization header, so the result explains how to persist the key, not how to keep going in this transcript. If you cannot edit the client config yourself, return the key and setup snippet to the user so they can paste it and reconnect. After minting, do not call this tool again -- configure the key at the transport layer and use the data tools once reconnected. Returns the key itself (shown once) plus setup instructions; it never returns platform data.

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• register_agent

  Human Pages

  Register a new agent on Human Pages. Returns an API key (hp_...) that you MUST save — it cannot be retrieved later. The agent is auto-activated on PRO tier (free during launch): 15 job offers/day, 50 profile views/day. Use the API key as agent_key in create_job_offer, get_human_profile, and other authenticated tools. Typical first step before hiring.

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• read_url

  Toolora MCP Server

  Use this tool whenever a URL appears in the conversation and the user wants to read, summarise, quote from, or process the page content. Triggers: 'read this article', 'summarise this page', 'what does this link say', 'fetch this URL'. Uses Readability to return clean text, title, author, and excerpt. If the result is empty or incomplete, fall back to scrape_url_js for JS-rendered pages. Free, no API key, no rate-limit signup required.

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• x711_code_sandbox

  x711 — Universal Agent Gas Station

  Execute JavaScript or Python code in an isolated sandbox. Use for: data processing, math, CSV parsing, JSON transformation, crypto calculations, algorithm testing. Secure — no filesystem access, no network. Returns: { output: string, runtime_ms: number, language: string }. Requires API key.

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• list_currencies

  Payram

  Lists every blockchain currency PayRam supports on this node (chain code, network, currency code). Public endpoint — works with only PAYRAM_BASE_URL set, no API key or JWT required. Use this to discover valid blockchainCode/currencyCode values before creating payments or payouts.

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• market_pulse

  AgentsPrice

  The AgentsPrice hive-mind pulse — a FREE, no-key, real-time aggregate of what agents are doing across the network right now: trending searches, the steepest live discounts found, open buy-side wants, and active marketplace listings. Real data only, never fabricated; richer the more agents use it. Use it to see demand, spot deals, or find what to list. No API key required.

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• register_autonomous

  ~Alter Identity

  Complete keyless self-registration as your own ~alter principal by submitting a solved proof-of-work challenge from register_autonomous_challenge. Mints you an owner-less ~handle and an agent key (shown once) with no human session. Free-tier queries are live immediately; earn-eligibility unlocks once you connect and verify at least one account. Free L0, no authentication required.

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• adw.sample

  AlpineDataWorks Intelligence Server

  FREE sample — no API key or credits required. Returns one complete, non-premium AlpineDataWorks Intelligence Object (score 0-100, band, top drivers, confidence, freshness, source lineage) so you can see exactly what a paid metric looks like. Call this first to try the data before subscribing.

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• login_and_get_key

  ainote

  Log in to an existing AI Note account and return an MCP API key. No prior authentication required. SIDE EFFECT: if the user has no MCP key yet, this call creates one (write to user.mcp_keys), so it is NOT idempotent and must be gated like other key-creation flows.

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• freetier_status

  Hermes Plant

  Check a free API key's remaining monthly quota, reset date, and upgrade path. Pass your hp_free_ key as apiKey. No key yet? POST an email to https://hermesplant.com/api/keys/free (250 calls/mo, no wallet).

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• quote_api

  anyapi

  Get the exact price of a run_api call BEFORE running it - free, no key required, nothing is charged or executed. Pass the same sku_id and input you would give run_api: the quote resolves pricing exactly as the run will, and also validates your input against the API schema so you catch invalid_input for free. Returns maxCostUsd (the ceiling reserved), minCostUsd (the likely charge), and the base/per-item breakdown explaining why they differ.

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• request_api_key

  Nefesh — Real-Time Human State Awareness for AI

  Request a free Nefesh API key. No existing API key needed for this call. IMPORTANT: You MUST ask the user for their real email address before calling this tool. Do NOT invent, guess, or generate an email address. The user will receive a verification link they must click to activate the key. Without clicking that link, no API key will be issued. Disposable or temporary email services are blocked. Example prompt to the user: "What is your email address? You will receive a verification link to activate your free API key." Flow: call this with the user's real email, then poll check_api_key_status every 10 seconds until status is 'ready'. Free tier: 1,000 calls/month, all signal types, 10 req/min. No credit card.

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