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Nexus Hub launch: API gateway, Telegram bot, and transparent model pricing

This release marks the public launch of Nexus Hub: a unified API gateway for popular AI models, an interactive Telegram bot with transparent pricing, and automated balance top-ups.

New capabilities

API gateway and model access

  • A single access point for integrating OpenAI-compatible (POST /v1/chat/completions) and Anthropic-compatible (POST /v1/messages) models.
  • A model discovery endpoint at GET /v1/models supporting access-key filtering and group wildcards.
  • Transparent token accounting via an append-only ledger: separate billing for input tokens, output tokens, and prompt caching (cache read and cache write).

Telegram bot and model catalog

  • An interactive main menu with /start, /menu, and /help commands tailored to user permissions.
  • A Models screen grouping models by family (GPT / Codex and Claude), displaying per-million token rates (input, output, cache read, cache write), supported endpoints, and last catalog update timestamps.
  • An adaptive plain-text fallback format for clients without rich-table support.

Automated balance top-ups

  • Integration with the Digiseller payment system for instant online top-ups.
  • Automated payment processing via webhooks with transaction validation.
  • Instant notifications in the Telegram bot upon successful balance crediting.

Improvements

Catalog and pricing

  • Consolidated duplicate model entries across compatible endpoints into a single clean catalog item.
  • Standardized prompt caching fields: cache read and write rates are displayed consistently across all supported families.
  • Protected static pricing rules from unintended expiration during long-running service uptime.

Bot interface

  • Improved table alignment and removed awkward line wraps in pricing screens.
  • Strict family separation prevents unrelated model lines from mixing together.

Fixed issues

API and payments

  • Fixed payment prechecks: customer ID is now optional, preventing payment failures when purchases are made without an upfront Nexus ID.
  • Digiseller webhooks using GET query parameters are now properly parsed and processed.
  • Fixed premature pricing expiration in the active model catalog.

Models and permissions

  • Disabled unavailable or unstable model variants (including claude-fable-5) to prevent failed user requests.
  • Corrected wildcard permission checks in GET /v1/models so permitted models appear reliably.

Compatibility and user actions

  • Use your unified Nexus Hub API key and corresponding base URLs for compatible client libraries.
  • Check model availability for your key via GET /v1/models or the Models menu in the Telegram bot before configuring applications.
  • Setup guides and client tutorials are available in the Telegram bot guide and quick start.