Kong/insomnia · error · Error

unknown request body mode: ${updatedReqBody.mode}

Error message

unknown request body mode: ${updatedReqBody.mode}

What it means

Error "unknown request body mode: ${updatedReqBody.mode}" thrown in Kong/insomnia.

Source

Thrown at packages/insomnia-scripting-environment/src/objects/request.ts:644

        // TODO: improve this by sniffing
        mimeType = 'application/octet-stream';
        break;
      }
      case 'formdata': {
        // boundary should already be part of Content-Type header
        mimeType = 'multipart/form-data';
        break;
      }
      case 'urlencoded': {
        mimeType = 'application/x-www-form-urlencoded';
        break;
      }
      case 'graphql': {
        mimeType = 'application/json';
        break;
      }
      default: {
        throw new Error(`unknown request body mode: ${updatedReqBody.mode}`);
      }
    }
  }
  if (originalReqBody.mimeType) {
    mimeType = originalReqBody.mimeType;
  }

  try {
    const textContent =
      updatedReqBody?.raw !== undefined
        ? updatedReqBody?.raw
        : updatedReqBody?.graphql
          ? JSON.stringify(updatedReqBody?.graphql)
          : undefined;

    return {
      mimeType: mimeType,
      text: textContent,

View on GitHub (pinned to d9bb2b0142)

When it happens

Trigger: Thrown at packages/insomnia-scripting-environment/src/objects/request.ts:644 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Kong/insomnia@d9bb2b0142 (2026-08-26). Data as JSON: /api/errors/4754ceab2b000cdf. Report an issue: GitHub.