AI_APICallError: litellm.BadRequestError: AzureException BadRequestError - { "error": { "message": "Missing required parameter: 'tools[0].name'.", ...

Description

My config:

  "provider": {
    "myprovider": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "myprovider",
      "options": {
        "baseURL": "myproviderapi.example.com/v1",
        "apiKey": "{env:myproviderGPT_OPENAI_API_KEY}",
      },
      "models": {
        "gpt-5": {
          "name": "gpt-5",
        },
        "gpt-5-mini": {
          "name": "gpt-5-mini",
        },
        "gpt-5-codex": {
          "name": "gpt-5-codex",
        },
        "gpt-5-nano": {
          "name": "gpt-5-nano",
        },
        "gpt-4.1": {
          "name": "gpt-4.1",
        },
        "gpt-4.1-mini": {
          "name": "gpt-4.1-mini",
        },
        "gpt-4o": {
          "name": "gpt-4o",
        },
        "gpt-4o-mini": {
          "name": "gpt-4o-mini",
        },
        "o4-mini": {
          "name": "o4-mini",
        },
        "o3": {
          "name": "o3",
        },
        "o3-mini": {
          "name": "o3-mini",
        },
        "o1": {
          "name": "o1",
        },
      },
    },
  },

When trying to use myprovider/gpt-5-codex, I get the following error:

AI_APICallError: litellm.BadRequestError: AzureException BadRequestError - {
  "error": {
    "message": "Missing required parameter: 'tools[0].name'.",
    "type": "invalid_request_error",
    "param": "tools[0].name",
    "code": "missing_required_parameter"
  }
}. Received Model Group=gpt-5-codex
Available Model Group Fallbacks=None

OpenCode version

v0.15.8

Steps to reproduce

No response

Screenshot and/or share link

No response

Operating System

macOS 15.6.1

Terminal

Ghostty

This issue might be a duplicate of existing issues. Please check:

AI_APICallError occurs after running Opencode with Azure GPT-5 Codex and GPT-5 for several minutes #3044: Similar Azure GPT-5 Codex error with tool calling after several minutes of usage
LiteLLM error: Anthropic doesn't support tool calling without tools= param specified #2915: LiteLLM tool calling error with Anthropic models requiring tools parameter
Slack MCP server request fails with AI_APICallError: tools.11.custom.name: String should match pattern '^[a-zA-Z0-9_-]{1,128}$' #3245: MCP server tool validation error with similar tools.name pattern matching issues
Tool usage failures with Claude Sonnet 4 via openai compatible provider despite working fine with direct Claude subscription #210: Tool usage failures with OpenAI compatible providers despite working fine with direct subscriptions

Feel free to ignore if none of these address your specific case.

Are you using any mcp servers?

Are you using any mcp servers?

Yes

@tnthi115

@tnthi115 what happens if u remove them does it work without them?

@tnthi115 what happens if u remove them does it work without them?

I commented out my mcp config, but I got the same error.

@tnthi115

@tnthi115 and u restarted opencode after updating the config?

@rekram1-node

@rekram1-node Yes I restarted it after updating the config. To confirm, I even asked a working model to use an the gitlab mcp server and it didn't work.

So what;s your setup is this a custom provider -> litellm -> azure?

Yes, litellm gateway and azure openai instance. I also have the same error as #2387 and the same setup as one of the ones mentioned in that issue.

I can't view that link you sent, is it relevant to debugging? Can u maybe provide a screenshot or something

@rekram1-node

@rekram1-node Sorry, posted the wrong link. I just updated it

And do you have any custom tools? I haven't seen anyone else have this issue with litellm so I tend to think it is specific to your setup

does this happen on every request or is it only on compacts

I have the same issue. It works when I turn off all Tools in Continue configuration or remove "tool_use" from model config

Can either of you try this:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "myprovider": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "myprovider",
      "options": {
        // "baseURL": "myproviderapi.example.com/v1"
        // Go to webhook.site and paste your unique url here:
        "baseURL": ""
        // comment out to avoid leaking secrets (or delete to be safe)
        // "apiKey": "{env:myproviderGPT_OPENAI_API_KEY}"
      },
      "models": {
        "gpt-5": {
          "name": "gpt-5"
        },
        .... 
      }
    }
  }
}

If you set the url to this proxy, then open opencode, send a message to any model under that provider, then go to the webhook site, grab the request body that is NOT for title gen (so the rlly big one with tools) and then show it here, it should help me answer which tool / thing is causing the issue

I encounter the exact same issue with azure in litellm. This seems to happens only when tagging a file.

The webhooks shows all functions has names.

However I notice this seems to be working with gpt-5.1 but not for gpt-5.1-codex

I'm experiencing a similar problem. My setup is as follows:
OpenCode -> Remote Litellm -> Azure
I added a proxy like this and logged the requests:
OpenCode -> local proxy -> Remote Litellm -> Azure

I don't have access to Remote Litellm and I don't know which setting is causing this, but I've identified the source of my problem, and I'm sharing it in case we have similar issues.

OpenCode calls tools according to the /chat/completion API, but Azure expects tool calls in the /responses API format.

/chat/completions api request body example (Source: https://platform.openai.com/docs/api-reference/chat/create)

...
"tools": [
    {
        "type": "function",
        "function": {
            "name": "bash",
            "description":
            ...
        }
    }
]
...

/responses api request body example (Source: https://platform.openai.com/docs/guides/function-calling#function-tool-example)

...
"tools": [
    {
        "type": "function",
        "name": "bash",
        "description":
        ...
    }
]
...

I encounter the exact same issue with azure in litellm.

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AI_APICallError: litellm.BadRequestError: AzureException BadRequestError - { "error": { "message": "Missing required parameter: 'tools[0].name'.", ... #3334

Description

OpenCode version

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Operating System

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AI_APICallError: litellm.BadRequestError: AzureException BadRequestError - { "error": { "message": "Missing required parameter: 'tools[0].name'.", ... #3334

Description

Description

OpenCode version

Steps to reproduce

Screenshot and/or share link

Operating System

Terminal

Activity

github-actions commented on Oct 21, 2025

rekram1-node commented on Oct 21, 2025

tnthi115 commented on Oct 21, 2025

rekram1-node commented on Oct 21, 2025

tnthi115 commented on Oct 21, 2025

rekram1-node commented on Oct 21, 2025

tnthi115 commented on Oct 21, 2025

rekram1-node commented on Oct 22, 2025

tnthi115 commented on Oct 22, 2025

rekram1-node commented on Oct 24, 2025

tnthi115 commented on Oct 24, 2025

rekram1-node commented on Oct 26, 2025

rekram1-node commented on Oct 28, 2025

beng90 commented on Oct 30, 2025

rekram1-node commented on Oct 30, 2025

theepicsaxguy commented on Dec 2, 2025

mrakblt commented on Dec 21, 2025

LouisLoyer commented on Mar 11, 2026

github-actions commented on Jul 3, 2026

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