overpod/mcp-telegram

v1.11.1 Bugfix

This release fixes issues for SREs watching stability and regressions.

Published 2mo MCP SaaS Integrations

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✓ No known CVEs patched

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✓ No known CVEs patched in this version

Topics

ai-tools claude gramjs mcp mcp-server model-context-protocol

+4 more

mtproto telegram typescript userbot

Summary

AI summary

Fixed crashes caused by unpaired UTF-16 surrogates in Telegram API responses.

Full changelog

Bug fix

Fix: unpaired UTF-16 surrogate crash

Telegram API can return strings containing unpaired UTF-16 surrogates (from certain emoji sequences or exotic character names). These surrogates break JSON.stringify() in the MCP SDK, causing invalid_request_error: no low surrogate in string errors.

Added sanitize() function that replaces lone surrogates with U+FFFD (replacement character) in all tool text responses. This prevents JSON serialization failures when chat names, descriptions, or messages contain problematic Unicode.

Docs

Added missing tools to README: telegram-search-global, telegram-get-profile-photo, telegram-get-reactions
Updated telegram-send-reaction parameters documentation (multi-emoji support, addToExisting)
Updated TypeScript badge to 6.0

Dependencies

TypeScript 5.9.3 → 6.0.2

View diff on GitHub

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About overpod/mcp-telegram

Telegram MCP server via MTProto/GramJS — 20 tools for reading chats, searching messages, downloading media, managing contacts. QR code login, npx zero-install. Hosted version at mcp-telegram.com.

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