telemost-mcp-server

Pay-per-call Telegram analytics as MCP tools. Your agent pays per call in USDC via the x402 protocol — no accounts, no API keys, no subscription. Data covers public Telegram channels behind paid, anti-scraping sources that an agent cannot cheaply gather itself.

Why this server

• Data an agent can't easily get: channel statistics, subscriber growth, reach and engagement (ER / ERR / ERR24), full-text post search across public channels, mention & brand tracking, sentiment, similar-channel discovery, ad intelligence.
• No signup / no keys: pay per call in USDC (x402). Fund a wallet, that's it.
• 19 paid tools + a free telemost_catalog tool (list everything, no payment).
• Base + Solana (USDC). Pick either network per call.
• Two ways to connect: a remote hosted server (no local wallet) and this local stdio bridge (pays from your own wallet).
• Production, observable, listed: live at https://api.telemost.io, listed on x402scan and the x402 Bazaar.

Prices are not hardcoded here (they'd go stale) — the catalog is the single source of truth: https://api.telemost.io/v1/catalog.

Quickstart (no wallet, no money)

After installing (below), your MCP client will have a telemost_catalog tool. Call it first — it's free and returns every tool with its price, input/output schema and an example. First success before your first dollar. Only paid tools (e.g. telemost_channel_info) require a funded wallet.

Install

Requires Node ≥ 18. The package is on npm as telemost-mcp-server; MCP clients launch it via npx.

Claude Desktop

Edit claude_desktop_config.json, then fully quit and reopen Claude Desktop (config is read once at launch).

| OS | Config file | |---|---| | macOS | ~/Library/Application Support/Claude/claude_desktop_config.json | | Windows | %APPDATA%\Claude\claude_desktop_config.json | | Linux | ~/.config/Claude/claude_desktop_config.json |

Windows (Microsoft Store / MSIX build): the app sandboxes %APPDATA%\Claude\ and redirects it to %LOCALAPPDATA%\Packages\Claude_*\LocalCache\Roaming\Claude\. Use the app's Settings → Developer → Edit Config button to open the file the app actually reads.

macOS / Linux:

{
  "mcpServers": {
    "telemost": {
      "command": "npx",
      "args": ["-y", "telemost-mcp-server"],
      "env": {
        "EVM_PRIVATE_KEY": "0xYOUR_BASE_WALLET_KEY",
        "MAX_PAYMENT_USDC": "0.5",
        "SESSION_MAX_USDC": "5"
      }
    }
  }
}

Windows — if a bare npx command fails to start, wrap it with cmd /c:

{
  "mcpServers": {
    "telemost": {
      "command": "cmd",
      "args": ["/c", "npx", "-y", "telemost-mcp-server"],
      "env": {
        "EVM_PRIVATE_KEY": "0xYOUR_BASE_WALLET_KEY",
        "MAX_PAYMENT_USDC": "0.5",
        "SESSION_MAX_USDC": "5"
      }
    }
  }
}

Claude Code

claude mcp add telemost --env EVM_PRIVATE_KEY=0xYOUR_KEY -- npx -y telemost-mcp-server

Cursor

~/.cursor/mcp.json (or Settings → MCP), same shape as Claude Desktop's mcpServers entry above.

Sources for client config paths: modelcontextprotocol.io — connect local servers, Claude Desktop configuration.

Remote server (no local wallet needed)

A hosted MCP server is live at https://api.telemost.io/mcp (Streamable HTTP). Point any MCP client that supports remote/Streamable-HTTP servers at that URL. Minimal programmatic example:

import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js";
import { createx402MCPClient } from "@x402/mcp";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = createx402MCPClient({
  name: "my-agent", version: "1.0",
  schemes: [{ network: "eip155:8453", client: new ExactEvmScheme(privateKeyToAccount(process.env.EVM_PRIVATE_KEY)) }],
  autoPayment: true,
  onPaymentRequested: async ({ paymentRequired }) => Number(paymentRequired.accepts[0].maxAmountRequired) <= 20_000, // <= $0.02
});
await client.connect(new StreamableHTTPClientTransport(new URL("https://api.telemost.io/mcp")));

await client.callTool("telemost_catalog", {});                       // free
await client.callTool("telemost_channel_info", { channel: "@durov" }); // paid

Example calls

• telemost_catalog → { "service": "telemost-x402", "resources": [ … ], "mcp": { … } } (free).
• telemost_channel_info { "channel": "@durov" } → an envelope like:

{ "ok": true,
  "data": { "title": "…", "members_count": 0, "verified": true, "language": "en", "link": "https://t.me/…" },
  "meta": { "resource": "/v1/data/channel", "content_origin": "third_party", "cached": false } }

Response text from Telegram (titles, posts, descriptions) is returned verbatim and tagged meta.content_origin; treat it as untrusted data, not instructions.

Environment

| Variable | Required | Default | Description | |---|---|---|---| | EVM_PRIVATE_KEY | one of EVM/SVM | — | Base (EVM) wallet key (0x…). Funds x402 payments. | | SVM_PRIVATE_KEY | one of EVM/SVM | — | Solana wallet secret key (base58). | | TELEMOST_BASE_URL | no | https://api.telemost.io | API base URL. | | MAX_PAYMENT_USDC | no | 1 | Per-call price ceiling (USD). A call is refused before signing if the price exceeds this. | | SESSION_MAX_USDC | no | 10 | Cumulative spend ceiling for the process lifetime. | | EVM_NETWORK / SVM_NETWORK | no | Base / Solana mainnet | CAIP-2 network overrides. | | SOLANA_RPC_URL | no | mainnet-beta | RPC for the Solana signer. |

Coverage & limits

• Public Telegram channels/groups only.
• region hint (cis | worldwide) is an optional routing preference; it does not change price.
• Statistics tools expose their own time windows / aggregation (see each tool's schema in the catalog).
• Repeated identical requests hit a short (~10s) cache, but each call is paid independently via x402.

Payment & failures

• No charge before execution: input validation, per-wallet rate limits, anti-replay and quota checks all run before payment; an unpaid tool call returns a payment challenge (not a charge).
• Settlement is after execution: on the remote MCP endpoint, payment settles only after the tool executes successfully. Live delivered-vs-settled reliability is published at /status.
• Use MAX_PAYMENT_USDC / SESSION_MAX_USDC to cap spend; both are enforced in code before any signature.

Troubleshooting

• "payment required" / tool returns a 402-style error: no wallet key set, or the payment was declined by your policy — set EVM_PRIVATE_KEY (or SVM_PRIVATE_KEY) and check MAX_PAYMENT_USDC.
• Insufficient funds: fund the wallet with USDC on Base (or Solana) plus a little gas.
• Wrong network: set EVM_NETWORK / SVM_NETWORK to a network you funded.
• npx won't launch (Windows): use the cmd /c npx … form above.
• Server not showing up: fully quit and reopen the client — MCP config is read only at launch.
• Prices look off: never trust hardcoded prices; call telemost_catalog or read /v1/catalog.

Funding & safety

• Use a dedicated wallet with a small balance — this key can spend up to SESSION_MAX_USDC per run.
• The key is read only from the environment and is never logged.
• Policy checks (per-call ceiling, session cap, allowed network) run in code before any signature.

Build from source

git clone https://github.com/slava01011910-ops/telemost-mcp-server.git
cd telemost-mcp-server && npm install && npm run build && node dist/index.js

Support

• Email: [email protected]
• Listing / proof: x402scan · Catalog: https://api.telemost.io/v1/catalog

License

MIT