---

title: ai-prompt-decorator keywords:

• Apache APISIX
• API Gateway
• Plugin
• ai-prompt-decorator description: This document contains information about the Apache APISIX ai-prompt-decorator Plugin.

---

Description

The ai-prompt-decorator plugin simplifies access to LLM providers, such as OpenAI and Anthropic, and their models by appending or prepending prompts into the request.

Plugin Attributes

Field	Required	Type	Description
prepend	Conditionally*	Array	An array of prompt objects to be prepended
prepend.role	Yes	String	Role of the message (system, user, assistant)
prepend.content	Yes	String	Content of the message. Minimum length: 1
append	Conditionally*	Array	An array of prompt objects to be appended
append.role	Yes	String	Role of the message (system, user, assistant)
append.content	Yes	String	Content of the message. Minimum length: 1

* Conditionally Required: At least one of prepend or append must be provided.

Example usage

Create a route with the ai-prompt-decorator plugin like so:

curl "http://127.0.0.1:9180/apisix/admin/routes/1" -X PUT \
  -H "X-API-KEY: ${ADMIN_API_KEY}" \
  -d '{
    "uri": "/v1/chat/completions",
    "plugins": {
      "ai-prompt-decorator": {
        "prepend":[
          {
            "role": "system",
            "content": "I have exams tomorrow so explain conceptually and briefly"
          }
        ],
        "append":[
          {
            "role": "system",
            "content": "End the response with an analogy."
          }
        ]
      }
    },
    "upstream": {
      "type": "roundrobin",
      "nodes": {
        "api.openai.com:443": 1
      },
      "pass_host": "node",
      "scheme": "https"
    }
  }'

Now send a request:

curl http://127.0.0.1:9080/v1/chat/completions -i -XPOST  -H 'Content-Type: application/json' -d '{
  "model": "gpt-4",
  "messages": [{ "role": "user", "content": "What is TLS Handshake?" }]
}' -H "Authorization: Bearer <your token here>"

Then the request body will be modified to something like this:

{
  "model": "gpt-4",
  "messages": [
    {
      "role": "system",
      "content": "I have exams tomorrow so explain conceptually and briefly"
    },
    { "role": "user", "content": "What is TLS Handshake?" },
    {
      "role": "system",
      "content": "End the response with an analogy."
    }
  ]
}