No header with name "${name}". Choices are [ ${headerNamesS

Error message

No header with name "${name}".
Choices are [
	${headerNamesStr}
]

What it means

Error "No header with name "${name}". Choices are [ ${headerNamesStr} ]" thrown in Kong/insomnia.

Source

Thrown at packages/insomnia/src/common/templating/local-template-tags.ts:971

            throw new Error('No header specified');
          }

          const headerNames: string[] = [];

          if (request.headers.length === 0) {
            throw new Error('No headers available');
          }

          for (const header of request.headers) {
            const headerName = await context.util.render(header.name);
            headerName && headerNames.push(headerName);
            if (headerName?.toLowerCase() === name.toLowerCase()) {
              return context.util.render(header.value);
            }
          }

          const headerNamesStr = headerNames.map(n => `"${n}"`).join(',\n\t');
          throw new Error(`No header with name "${name}".\nChoices are [\n\t${headerNamesStr}\n]`);
        }
        if (attribute === 'oauth2' || attribute === 'oauth2-identity' || attribute === 'oauth2-refresh') {
          const access = await context.util.models.oAuth2Token.getByRequestId(request._id);
          if (!access || !access.accessToken) {
            throw new Error('No OAuth 2.0 access tokens found for request');
          }
          if (attribute === 'oauth2') {
            return access.accessToken;
          }
          if (attribute === 'oauth2-identity') {
            return access.identityToken;
          }
          if (attribute === 'oauth2-refresh') {
            return access.refreshToken;
          }
        }
        if (attribute === 'name') {
          return request.name;

View on GitHub (pinned to d9bb2b0142)

When it happens

Trigger: Thrown at packages/insomnia/src/common/templating/local-template-tags.ts:971 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/c8a643b220fd7465. Report an issue: GitHub.