usebruno/bruno · error · Error

Failed to parse GraphQL variables: ${err.message}

Error message

Failed to parse GraphQL variables: ${err.message}

What it means

Error "Failed to parse GraphQL variables: ${err.message}" thrown in usebruno/bruno.

Source

Thrown at packages/bruno-electron/src/ipc/network/index.js:636

    if (!hasExplicitScheme(request.url)) {
      // The scheme must be present before encoding. Without a `://`, encodeUrl
      // treats a `host:port` authority as a path segment and percent-encodes the
      // port colon (localhost:6000 → localhost%3A6000), which then resolves to a
      // bogus host once configureRequest prepends http://.
      request.url = `http://${request.url}`;
    }

    if (request.settings?.encodeUrl) {
      request.url = encodeUrl(request.url);
    }

    // if this is a graphql request, parse the variables, only after interpolation
    // https://github.com/usebruno/bruno/issues/884
    if (request.mode === 'graphql' && typeof request.data?.variables === 'string') {
      try {
        request.data.variables = JSON.parse(request.data.variables);
      } catch (err) {
        throw new Error(`Failed to parse GraphQL variables: ${err.message}`);
      }
    }

    // stringify the request url encoded params
    const contentTypeHeader = Object.keys(request.headers).find((name) => name.toLowerCase() === 'content-type');

    if (contentTypeHeader && request.headers[contentTypeHeader] === 'application/x-www-form-urlencoded') {
      if (Array.isArray(request.data)) {
        request.data = buildFormUrlEncodedPayload(request.data);
      } else if (typeof request.data !== 'string') {
        request.data = qs.stringify(request.data, { arrayFormat: 'repeat' });
      }
      // if `data` is of string type - return as-is (assumes already encoded)
    }

    const contentType = contentTypeHeader ? request.headers[contentTypeHeader] : '';
    if (typeof contentType === 'string' && contentType.startsWith('multipart/')) {
      if (typeof request.data !== 'string' && !isFormData(request.data)) {

View on GitHub (pinned to 9bdd81c7bd)

Solutions

1. Fix the GraphQL variables so they are valid JSON.
2. Check the reported parser error for the exact position.

When it happens

Trigger: Thrown at packages/bruno-electron/src/ipc/network/index.js:636 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of usebruno/bruno@9bdd81c7bd (2026-08-13). Data as JSON: /api/errors/b0bf4e6d3f17c2ee. Report an issue: GitHub.