# Chat with File Attachments

## Chat with File Attachments

> Send images and PDF documents as part of your message request.

```json
{"openapi":"3.1.0","info":{"title":"Default module","version":"1.0.0"},"tags":[{"name":"Chat with File Attachments"}],"servers":[{"url":"https://llm.onerouter.pro","description":"正式环境"}],"security":[],"paths":{"/v1/messages":{"post":{"summary":"Chat with File Attachments","deprecated":false,"description":"Send images and PDF documents as part of your message request.","tags":["Chat with File Attachments"],"parameters":[{"name":"Authorization","in":"header","description":"","required":true,"schema":{"type":"string"}}],"requestBody":{"content":{"application/json":{"schema":{"type":"object","properties":{"model":{"type":"string"},"messages":{"type":"array","items":{"type":"object","properties":{"role":{"type":"string"},"content":{"type":"array","items":{"type":"object","properties":{"type":{"type":"string"},"source":{"type":"object","properties":{"type":{"type":"string"},"media_type":{"type":"string"},"data":{"type":"string"}},"required":["type","media_type","data"]},"text":{"type":"string"}},"required":["type","source"]}}}}},"stream":{"type":"boolean"},"stream_options":{"type":"object","properties":{"include_usage":{"type":"boolean"}},"required":["include_usage"]},"usage":{"type":"object","properties":{"include":{"type":"boolean"}},"required":["include"]}},"required":["model","messages","stream","stream_options","usage"]}}},"required":true},"responses":{"200":{"description":"","content":{"application/json":{"schema":{"type":"object","properties":{"content":{"type":"array","items":{"type":"object","properties":{"text":{"type":"string"},"type":{"type":"string"}}}},"cost":{"type":"number"},"cost_details":{"type":"object","properties":{"audio_cost":{"type":"integer"},"byok_cost":{"type":"integer"},"completion_cost":{"type":"number"},"discount_rate":{"type":"integer"},"image_cost":{"type":"integer"},"is_byok":{"type":"boolean"},"native_web_search_cost":{"type":"integer"},"plugin_web_search_cost":{"type":"integer"},"prompt_cache_read_cost":{"type":"integer"},"prompt_cache_write_1_h":{"type":"integer"},"prompt_cache_write_5_min":{"type":"integer"},"prompt_cache_write_cost":{"type":"integer"},"prompt_cost":{"type":"number"},"reasoning_cost":{"type":"integer"},"tools_cost":{"type":"integer"},"video_cost":{"type":"integer"}},"required":["audio_cost","byok_cost","completion_cost","discount_rate","image_cost","is_byok","native_web_search_cost","plugin_web_search_cost","prompt_cache_read_cost","prompt_cache_write_1_h","prompt_cache_write_5_min","prompt_cache_write_cost","prompt_cost","reasoning_cost","tools_cost","video_cost"]},"id":{"type":"string"},"model":{"type":"string"},"role":{"type":"string"},"stop_reason":{"type":"string"},"stop_sequence":{"type":"null"},"type":{"type":"string"},"usage":{"type":"object","properties":{"cache_creation":{"type":"object","properties":{"ephemeral_1h_input_tokens":{"type":"integer"},"ephemeral_5m_input_tokens":{"type":"integer"}},"required":["ephemeral_1h_input_tokens","ephemeral_5m_input_tokens"]},"cache_creation_input_tokens":{"type":"integer"},"cache_read_input_tokens":{"type":"integer"},"input_tokens":{"type":"integer"},"output_tokens":{"type":"integer"}},"required":["cache_creation","cache_creation_input_tokens","cache_read_input_tokens","input_tokens","output_tokens"]}},"required":["content","cost","cost_details","id","model","role","stop_reason","stop_sequence","type","usage"]}}},"headers":{}}}}}}}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://infronai.gitbook.io/docs/llm-apis/anthropic-compatible-api/chat-with-file-attachments.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.