SillyTavern/SillyTavern · error · Error

ComfyUI RunPod returned an error.

Error message

ComfyUI RunPod returned an error.

What it means

Thrown by validateComfyRunPodUrl() when the POST to /api/sd/comfyrunpod/ping returns a non-2xx status. The server proxy pings the RunPod serverless ComfyUI endpoint. Catch surfaces 'Could not validate ComfyUI RunPod API: ComfyUI RunPod returned an error.'

Source

Thrown at public/scripts/extensions/stable-diffusion/index.js:1477

        toastr.error(`Could not validate ComfyUI API: ${error.message}`);
    }
}

async function validateComfyRunPodUrl() {
    try {
        if (!extension_settings.sd.comfy_runpod_url) {
            throw new Error('URL is not set.');
        }

        const result = await fetch('/api/sd/comfyrunpod/ping', {
            method: 'POST',
            headers: getRequestHeaders(),
            body: JSON.stringify({
                url: extension_settings.sd.comfy_runpod_url,
            }),
        });
        if (!result.ok) {
            throw new Error('ComfyUI RunPod returned an error.');
        }

        await loadSettingOptions();
        toastr.success('ComfyUI RunPod API connected.');
    } catch (error) {
        toastr.error(`Could not validate ComfyUI RunPod API: ${error.message}`);
    }
}

async function onModelChange() {
    const selectedModel = $('#sd_model').find(':selected');
    extension_settings.sd.model = selectedModel.val();
    saveSettingsDebounced();

    if (extension_settings.sd.model && extension_settings.sd.source === sources.electronhub) {
        const cachedModel = selectedModel.data('model');
        const models = cachedModel ? [cachedModel] : await loadElectronHubModels();
        ensureElectronHubQualitySelect(models);

View on GitHub (pinned to 8172dcd0ee)

Solutions

1. Check the SillyTavern server console for the real upstream error returned by /api/sd/comfyrunpod/ping.
2. Confirm the RunPod serverless endpoint ID/URL is current and the deployment is running (check RunPod dashboard).
3. Verify the RUNPOD_API_KEY is set on the SillyTavern server and valid.
4. Retry once — serverless cold starts can fail the first ping.

async function validateWithRetry(max = 2) {
  for (let i = 0; i <= max; i++) {
    try { await validateComfyRunPodUrl(); return; }
    catch (e) {
      if (i === max || /not set/i.test(e.message)) throw e;
      await new Promise(r => setTimeout(r, 2000 * (i + 1))); // backoff for cold starts
    }
  }
}

When it happens

Trigger: The RunPod serverless endpoint URL is wrong or the deployment is scaled to zero/cold-starting; the RunPod API key is missing or invalid server-side; the serverless payload template errors; network egress from the SillyTavern host to RunPod is blocked.

Common situations: RunPod serverless ID mistyped; endpoint paused/deleted; cold start timeout exceeded; missing server-side RUNPOD_API_KEY env var.

Related errors

• ComfyUI returned an error.
• Internal Server Error
• Upload failed with status ${result.status}
• Extras API call failed
• Failed to caption image via Multimodal API.

AI-assisted analysis of SillyTavern/SillyTavern@8172dcd0ee (2026-08-13). Data as JSON: /api/errors/e09d536309014e3b. Report an issue: GitHub.