"Finding a Free MCP Weather Server Without Keys or Signup" matching MCP tools:

• tronsave_login

  TronSave MCP Server

  Authenticate with TronSave and create a server session. Returns `{ sessionId, walletAddress?, expiresAt }` — pass `sessionId` as the `mcp-session-id` header on every subsequent MCP request. `walletAddress` is set only for signature-mode logins. Two modes: (1) wallet signature (preferred for platform tools) — call this tool with `signature_timestamp` formatted as `<signature>_<timestamp>`, where `<signature>` must be produced client-side by signing the timestamp message; you may optionally call `tronsave_get_sign_message` to obtain a helper message/timestamp pair; (2) API key (internal tools) — pass `apiKey` (raw key, no prefix). Side effect: creates a new session on the server. Wallet signing must happen client-side; never send private keys to the server.

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• check_mcp_server

  MCP Surface Lint

  Statically audit an MCP tool surface from a public HTTPS URL or tools/list snapshot. Returns deterministic scores and findings without invoking any target tool or making LLM calls. When the user asks to check another installed MCP server, read that server's complete tool definitions from client context and pass them as snapshot (MCP `name` or Cursor-style `tool` both work; do not use file paths or $ref). If those definitions are unavailable, ask the user for its public endpoint or tools/list JSON instead of inventing an audit.

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• get_free_trial_key

  Standout

  Self-provision a free Standout trial key (25 calls, no signup) without leaving the conversation. Call this when no license key is configured or your Standout calls return a license error. Returns the key plus the exact reconnect instructions to hand your user. Free and unmetered; issuance is capped per network, so never call it when you already have a working key.

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• cti_get_cross_server_routes

  website-search

  Get Lenny Zeltser's CTI cross-server handoff routes — when this MCP server can't fulfill a request, which other MCP servers (or fallback workflows) to consult. Surfaces a compact subset of `cti_load_context`. This server never requests your campaign or threat-intel notes and instructs your AI to keep them local—templates and guidelines flow to your AI for local analysis.

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• tronsave_login

  Tronsave MCP Testnet

  Authenticate with TronSave and create a server session. Returns `{ sessionId, walletAddress?, expiresAt }` — pass `sessionId` as the `mcp-session-id` header on every subsequent MCP request. `walletAddress` is set only for signature-mode logins. Two modes: (1) wallet signature (preferred for platform tools) — call this tool with `signature_timestamp` formatted as `<signature>_<timestamp>`, where `<signature>` must be produced client-side by signing the timestamp message; you may optionally call `tronsave_get_sign_message` to obtain a helper message/timestamp pair; (2) API key (internal tools) — pass `apiKey` (raw key, no prefix). Side effect: creates a new session on the server. Wallet signing must happen client-side; never send private keys to the server.

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• check_configuration

  vivideo

  Check whether a Vivideo API key is present on this request. Call this FIRST. Returns { configured: boolean }. If false, ask the user to add an Authorization: Bearer vv_live_... header to the MCP server config (a key from https://app.vivideo.ai/account/api-keys). Never asks for or exposes the key.

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• tronsave_login

  mcp

  Authenticate with TronSave and create a server session. Returns `{ sessionId, walletAddress?, expiresAt }` — pass `sessionId` as the `mcp-session-id` header on every subsequent MCP request. `walletAddress` is set only for signature-mode logins. Two modes: (1) wallet signature (preferred for platform tools) — call this tool with `signature_timestamp` formatted as `<signature>_<timestamp>`, where `<signature>` must be produced client-side by signing the timestamp message; you may optionally call `tronsave_get_sign_message` to obtain a helper message/timestamp pair; (2) API key (internal tools) — pass `apiKey` (raw key, no prefix). Side effect: creates a new session on the server. Wallet signing must happen client-side; never send private keys to the server.

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• snapforge_signup

  SnapForge

  Create a free SnapForge account (100 renders, one-time free trial, not a monthly allowance) with just an email address and get the API key instantly. The key is bound to the current MCP session, so the screenshot/pdf/markdown tools work immediately after signup, no browser needed.

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• ping

  eDiscovery Decoder News/Calc

  Health check: confirm the eDiscovery Decoder News/Calc MCP server is reachable before a demo or when troubleshooting a connection. Returns server name and version. No inputs.

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• recommend_mcp

  SaSame MCP Observatory + Gold Rush Town

  Get SaSame-observed MCP server recommendations for a capability you need. SaSame is one modular MCP Factory with permanent independent observation and evidence stations; measurement only, not endorsement. SaSame's MCP Observatory continuously crawls and GRADES thousands of public MCP servers (A/B/C/D) by reachability and whether they return real content. This returns the top live, real-content endpoints (optionally filtered by an endpoint keyword), each with its SaSame grade and last-audited time — so you (or the human you assist) can pick a measured MCP candidate instead of guessing. Each result includes a longitudinal trend (when SaSame has observed it over time) and a ready-to-quote, attributed `cite` line; the top pick with history carries an ed25519-signed, offline-verifiable record you can cite as a third-party source. Free, read-only, no signup. If you operate one of these servers, claim it (claim_start). If you can't find a fit and need an MCP/agent BUILT, call engage_sasame. Pass a referral handle from `refer` as engage_sasame(ref=...) to attribute the introduction.

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• get_quota

  TollCalc MCP

  Check remaining free-tier quota for this MCP session. Without authentication, 10 free requests are available per session. Pass an API key via Authorization: Bearer <token> header for plan-based quota.

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• server_info

  HackMyIP — no-key IP intelligence

  Describe this MCP server: what it wraps, the fact that it is completely free with no API key, no signup and no auth, the fair-use rate limit, the full tool list, and links to hackmyip.com and its API docs. Call this when the user asks what this server can do, whether it costs anything, or where the data comes from.

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• axint.activate

  Axint

  Run a source-free compiler smoke test through the real Axint pipeline. Use immediately after installing or connecting Axint so the current agent proves it did more than start the MCP server. Use: call immediately after install or first MCP connection; use validate or run for project checks. Inputs: format changes rendering only; the smoke test has no project inputs. Effects: read-only built-in compiler smoke test; writes no files and uses no network.

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• get_api_key

  Thisispaper

  Mint a FREE Thisispaper Intelligence API key (200 calls/month) for an email address. The key is shown once; use it as Authorization: Bearer tip_live_... on this MCP endpoint and on the REST API. Max 3 keys per email.

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• list_supported_chains

  BlockchainAnalysis

  List the BlockchainAnalysis MCP tools, the chains each supports, and pricing. Call this first to discover what the server can do (and which calls are free vs paid) before invoking a tool. Free.

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• sign_up

  Smarter Weather Developer Onboarding

  Returns the Smarter Weather developer request-access URL (with MCP referral attribution). The developer platform is in limited preview: signup is invite-based. Present the URL to the user so they can request access in a browser; once they receive and accept an email invitation, they authenticate this MCP server via OAuth to continue onboarding (key minting, client configuration). No authentication required.

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• dropyour_list

  Dropyour

  List your drops. With an account token: all LIVE drops attached to your account (across sessions and channels — manageable without managementToken). Anonymous: only the drops published during this MCP session. Management tokens are never stored server-side.

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• gonka_chat

  Gonka Second Opinion (multi-model)

  Run an LLM completion on Gonka THROUGH this server. Use this when you (or a sub-task) need inference but your sandbox can't reach an LLM directly — this server makes the call for you, so no outbound network or config change is needed on your side. Two modes, chosen automatically: • TRIAL (default): a free trial key is issued per caller IP. Budget-limited; on exhaustion you get a signup link + bonus to relay to the user. • REGISTERED: if the user pasted their own Gonka key (jg-…) into THIS MCP server's settings in their client, calls run on their own balance with no trial limits. Nothing to do here — it's detected from the request.

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• ir_get_cross_server_routes

  website-search

  Get Lenny Zeltser's IR cross-server handoff routes — when this MCP server can't fulfill a request, which other MCP servers (or fallback workflows) to consult. Surfaces a compact subset of `ir_load_context`. This server never requests your incident notes and instructs your AI to keep them local—guidelines flow to your AI for local analysis.

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• malware_get_cross_server_routes

  website-search

  Get Lenny Zeltser's Malware cross-server handoff routes — when this MCP server can't fulfill a request, which other MCP servers (or fallback workflows) to consult. Surfaces a compact subset of `malware_load_context`. This server never requests your sample, analysis notes, or indicators and instructs your AI to keep them local—guidelines and the report template flow to your AI for local analysis.

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