Changelog

2026-05-22

Discovery session 2

Confirmed surface (live probe against api.fuelix.ai/v1):

103 models available including GPT-5.4, Claude Sonnet 4.6, Gemini 3.x, Llama 4, imagen-4
All previously documented endpoints remain supported
POST /responses confirmed working (requires max_output_tokens >= 16)
Anthropic Messages API (POST /messages) confirmed returning Anthropic-format responses

Docs added:

Audio (TTS + transcriptions)
Images (generations + edits)
Files API
Assistants API (assistants + threads + messages + runs)
Vector Stores
Anthropic Messages API
Responses API
Deployment Notes

2026-05-22 (initial)

Initial discovery and implementation

Discovery: Live probing of https://api.fuelix.ai/v1 via scripts/fuelix-mega-discovery.ts.

Supported endpoints confirmed:

Endpoint	Notes
`GET /models`	Full model list
`GET /models/:id`	Individual model details
`POST /chat/completions`	All models; streaming SSE supported
`POST /embeddings`	`float` and `base64` encoding, `dimensions` param
`POST /audio/speech`	TTS; binary audio stream
`POST /audio/transcriptions`	Whisper; multipart/form-data
`POST /images/generations`	imagen-3, imagen-3-fast (not dall-e-3)
`POST /images/edits`	multipart/form-data
`GET/POST/DELETE /files*`	Shared upstream account scope
`GET/POST/DELETE /assistants*`	Assistants v2; shared scope
`GET/POST/DELETE /threads*`	Full thread/message/run tree; shared scope
`GET/POST/DELETE /vector_stores*`	Vector knowledge bases; shared scope
`POST /responses`	GPT models only; `max_output_tokens >= 16`
`POST /messages`	Anthropic Messages API; Anthropic-format response

Emulated:

Endpoint	Notes
`POST /completions`	Emulated via `/chat/completions`; streaming rejected with 400

Unsupported (returns 404):

POST /audio/translations
POST /images/variations
POST /moderations
GET /batches
GET /fine_tuning/jobs
POST /rerank
GET /usage
GET /realtime

Chat completion accepted params:

temperature, top_p, stop, presence_penalty, frequency_penalty, user, seed, n, response_format (text/json_object/json_schema), logprobs, top_logprobs, logit_bias, tools, tool_choice, stream, stream_options, reasoning_effort, thinking, service_tier, store, modalities, max_tokens, max_completion_tokens

Architecture implemented:

Cloudflare Workers (Hono routing)
Cloudflare D1 (SQLite) for API key storage and usage tracking
Cloudflare Durable Objects (ApiKeyLimiter) for per-key rate limiting
Cloudflare Queues (bve-gateway-events) for async audit events
SHA-256 + pepper key hashing (raw keys never stored)
Header allowlist filtering (internal Fuelix headers stripped)
Body size limit (10 MB)
JSONDecodeError normalization (Fuelix 500 → gateway 400)