API Reference

Base URL: https://api.devlens.top

Authentication

All requests require a Bearer token in the Authorization header:

Authorization: Bearer sk-YOUR_KEY

POST /v1/chat/completions

Primary endpoint. Supports multi-turn conversation, streaming, and function calling.

Request body

Parameter	Type	Required	Description
model	string	Yes	Model identifier, e.g. gpt-5
messages	array	Yes	Conversation messages
temperature	number	No	Sampling temperature, 0–2. Default: 1
max_tokens	number	No	Maximum tokens to generate
stream	boolean	No	Enable SSE streaming. Default: false
top_p	number	No	Nucleus sampling, 0–1. Default: 1
frequency_penalty	number	No	0–2. Default: 0
presence_penalty	number	No	0–2. Default: 0

Message format

{
  "messages": [
    {"role": "system", "content": "You are a helpful assistant."},
    {"role": "user", "content": "Hello"},
    {"role": "assistant", "content": "Hi — how can I help?"},
    {"role": "user", "content": "Write a haiku"}
  ]
}

Example

curl https://api.devlens.top/v1/chat/completions \
  -H "Authorization: Bearer sk-YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5",
    "messages": [{"role": "user", "content": "Hello"}],
    "max_tokens": 4096
  }'

Response

{
  "id": "chatcmpl-xxx",
  "object": "chat.completion",
  "model": "gpt-5",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hello! How can I help you today?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 10,
    "completion_tokens": 8,
    "total_tokens": 18
  }
}

Streaming

Set "stream": true. The response uses Server-Sent Events:

data: {"id":"chatcmpl-xxx","choices":[{"delta":{"content":"Hello"},"index":0}]}

data: {"id":"chatcmpl-xxx","choices":[{"delta":{"content":"!"},"index":0}]}

data: [DONE]

POST /v1/completions

Legacy text completion. Use Chat Completions for most use cases.

POST /v1/embeddings

Convert text to vector representations.

Parameter	Type	Required	Description
model	string	Yes	Embedding model identifier
input	string / array	Yes	Text to embed

GET /v1/models

Returns available models for the authenticated key.

curl https://api.devlens.top/v1/models \
  -H "Authorization: Bearer sk-YOUR_KEY"