[Bug]: OpenAI OAuth Realtime Talk sessions fail /v1/realtime/calls with HTTP 500

## Bug type

Behavior bug (incorrect output/state without crash)

## Beta release blocker

No

## Summary

On OpenClaw 2026.6.1, OpenAI OAuth-backed Realtime Talk reports configured and returns Realtime session metadata, but every media handshake to `https://api.openai.com/v1/realtime/calls` returns HTTP 500 when no OpenAI API key is configured.

## Steps to reproduce

1. Run installed OpenClaw 2026.6.1 Gateway on loopback. In this repro the Gateway was already running at `ws://127.0.0.1:18789` through the managed systemd user service.
2. Confirm OpenAI Realtime Talk has no direct API key configured but reports configured through OAuth:

   ```bash
   OPENCLAW_GATEWAY_URL=ws://127.0.0.1:18789 node scripts/audit-linux-talk-realtime-handshake.mjs --session main --json
   ```

3. Optionally run the relay repro against the same installed Gateway:

   ```bash
   node scripts/audit-linux-talk-realtime-relay.mjs --url ws://127.0.0.1:18789 --session main --json
   ```

## Expected behavior

Either OpenAI OAuth-backed Realtime Talk should complete the media handshake, or OpenClaw should not report OAuth/no-key OpenAI Realtime as configured/media-ready without a passing live `/v1/realtime/calls` audit.

## Actual behavior

The Gateway reports OpenAI Realtime as configured and `talk.client.create` returns Realtime session metadata, but every tested SDP offer to `https://api.openai.com/v1/realtime/calls` returns HTTP 500 `Internal Server Error`.

The Gateway relay path also fails before ready. On installed 2026.6.1 that relay failure is surfaced to the audit as a close before ready with reason `completed`; the WebRTC audit below shows the underlying media handshake failure is HTTP 500.

## OpenClaw version

OpenClaw 2026.6.1 (2e08f0f)

## Operating system

Ubuntu 24.04.4 LTS

## Install method

npm/global install with managed systemd user Gateway service.

Gateway status excerpt:

```text
CLI: OpenClaw 2026.6.1 (2e08f0f)
Gateway service: systemd user, running
Gateway target: ws://127.0.0.1:18789
Node: v24.16.0
```

## Model

`gpt-realtime-2` and `gpt-realtime`

## Provider / routing chain

OpenClaw Gateway Talk -> OpenAI Realtime provider -> OAuth-backed Realtime client secret/session metadata -> `https://api.openai.com/v1/realtime/calls`

## Additional provider/model setup details

No direct OpenAI API key was configured for the tested Gateway Realtime path.

Observed audit fields:

```json
{
  "provider": "openai",
  "mode": "realtime",
  "transport": "webrtc",
  "brain": "agent-consult",
  "model": "gpt-realtime-2",
  "voice": "cedar",
  "hasConfiguredApiKey": false,
  "hasOpenAIApiKeyEnv": false
}
```

`talk.catalog` reported the provider as configured and browser-session capable:

```json
{
  "activeProvider": "openai",
  "provider": "openai",
  "configured": true,
  "modes": ["realtime"],
  "transports": ["webrtc", "gateway-relay"],
  "brains": ["agent-consult"],
  "supportsBrowserSession": true,
  "supportsToolCalls": true
}
```

## Logs, screenshots, and evidence

Primary WebRTC audit result on installed OpenClaw 2026.6.1:

```json
{
  "runtimeVersion": "2026.6.1",
  "sessionKey": "main",
  "talkConfig": {
    "provider": "openai",
    "mode": "realtime",
    "transport": "webrtc",
    "brain": "agent-consult",
    "model": "gpt-realtime-2",
    "voice": "cedar",
    "hasConfiguredApiKey": false
  },
  "talkCatalog": {
    "activeProvider": "openai",
    "provider": "openai",
    "configured": true,
    "modes": ["realtime"],
    "transports": ["webrtc", "gateway-relay"],
    "brains": ["agent-consult"],
    "supportsBrowserSession": true,
    "supportsToolCalls": true
  },
  "results": [
    {
      "requestedModel": "gpt-realtime-2",
      "sessionModel": "gpt-realtime-2",
      "provider": "openai",
      "transport": "webrtc",
      "offerUrl": "https://api.openai.com/v1/realtime/calls",
      "iceMode": "immediate",
      "status": 500,
      "ok": false,
      "body": "Internal Server Error"
    },
    {
      "requestedModel": "gpt-realtime-2",
      "sessionModel": "gpt-realtime-2",
      "provider": "openai",
      "transport": "webrtc",
      "offerUrl": "https://api.openai.com/v1/realtime/calls",
      "iceMode": "ice-complete",
      "status": 500,
      "ok": false,
      "body": "Internal Server Error"
    },
    {
      "requestedModel": "gpt-realtime",
      "sessionModel": "gpt-realtime",
      "provider": "openai",
      "transport": "webrtc",
      "offerUrl": "https://api.openai.com/v1/realtime/calls",
      "iceMode": "immediate",
      "status": 500,
      "ok": false,
      "body": "Internal Server Error"
    },
    {
      "requestedModel": "gpt-realtime",
      "sessionModel": "gpt-realtime",
      "provider": "openai",
      "transport": "webrtc",
      "offerUrl": "https://api.openai.com/v1/realtime/calls",
      "iceMode": "ice-complete",
      "status": 500,
      "ok": false,
      "body": "Internal Server Error"
    }
  ],
  "diagnosis": {
    "status": "blocked-upstream",
    "summary": "Gateway can mint OpenAI OAuth-backed Realtime client sessions, but OpenAI rejects every media handshake with HTTP 500.",
    "evidence": [
      "talk.config has no configured OpenAI provider API key.",
      "talk.catalog reports OpenAI Realtime configured with WebRTC support.",
      "talk.client.create returned Realtime session metadata for every tested model.",
      "Every tested browser SDP offer to /v1/realtime/calls returned HTTP 500."
    ]
  }
}
```

Secondary relay audit result on the same installed Gateway:

```json
{
  "runtimeVersion": "2026.6.1",
  "hasOpenAIApiKeyEnv": false,
  "talkConfig": {
    "provider": "openai",
    "mode": "realtime",
    "transport": "webrtc",
    "brain": "agent-consult",
    "model": "gpt-realtime-2",
    "voice": "cedar",
    "hasConfiguredApiKey": false
  },
  "talkCatalog": {
    "activeProvider": "openai",
    "provider": "openai",
    "configured": true,
    "supportsBrowserSession": true,
    "supportsToolCalls": true
  },
  "create": {
    "provider": "openai",
    "transport": "gateway-relay",
    "mode": "realtime",
    "brain": "agent-consult"
  },
  "ready": false,
  "closeBeforeReadyReason": "completed",
  "errorBeforeReadyMessage": null,
  "diagnosis": {
    "status": "blocked-upstream",
    "summary": "Gateway relay can create a no-key OAuth-backed Realtime session, but the provider connection fails before relay ready."
  }
}
```

Diagnostics export was generated locally for the installed Gateway:

```text
openclaw-diagnostics-2026-06-04T20-07-57-876Z-4051289.zip
```

I can attach it if useful after reviewing the redacted contents.

## Impact and severity

Affected: OpenClaw Talk users trying to use OpenAI Realtime through OpenAI OAuth without configuring a standard OpenAI API key.

Severity: High for this workflow; it blocks live Realtime audio.

Frequency: 4/4 WebRTC media handshake attempts and 1/1 relay attempt in this repro.

Consequence: OAuth/no-key OpenAI Realtime Talk appears configured and can create sessions, but audio never becomes ready.

## Additional information

Related but not exact duplicates found during local issue search:

- #76498 documented Realtime Talk Platform billing/API-credit confusion.
- #77215 documented intended API-key/OAuth Realtime client-secret paths.
- #88451 unified OpenAI provider identity under `openai`.

Last known good / first known bad version: `NOT_ENOUGH_INFO`.


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[Bug]: OpenAI OAuth Realtime Talk sessions fail /v1/realtime/calls with HTTP 500 #90456

Bug type

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Summary

Steps to reproduce

Expected behavior

Actual behavior

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Model

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Additional provider/model setup details

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Uh oh!

[Bug]: OpenAI OAuth Realtime Talk sessions fail /v1/realtime/calls with HTTP 500 #90456

Description

Bug type

Beta release blocker

Summary

Steps to reproduce

Expected behavior

Actual behavior

OpenClaw version

Operating system

Install method

Model

Provider / routing chain

Additional provider/model setup details

Logs, screenshots, and evidence

Impact and severity

Additional information

Metadata

Metadata

Assignees

Labels

Type

Fields

Projects

Milestone

Relationships

Development

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