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Express handler support for yaschema-api





Downloads Size

Express support for handling APIs declared using yaschema-api.

Basic Example

// API schema and metadata
// You'll typically define this in a separate package shared by your server and clients
export const postPing = makeHttpApi({
  method: 'POST',
  routeType: 'rest',
  url: '/ping',
  isSafeToRetry: true,
  schemas: {
    request: {
      body: schema.object({
        echo: schema.string().allowEmptyString().optional()
    successResponse: {
      status: schema.number(StatusCodes.OK),
      body: schema.string()
// Register the API handler with Express
export const register = (app: Express) =>
  registerHttpApiHandler(app, postPing, {}, async ({ express: _express, input, output }) => {
    output.success(200, { body: (input.body.echo?.length ?? 0) > 0 ? `PONG ${input.body.echo ?? ''}` : 'PONG' });

The options object passed to registerHttpApiHandler lets you override the validation mode and/or specify middleware.


Thanks for checking it out. Feel free to create issues or otherwise provide feedback.

API Docs

Be sure to check out our other TypeScript OSS projects as well.