Scorecard TypeScript API Library

This library provides convenient access to the Scorecard REST API from server-side TypeScript or JavaScript.

The REST API documentation can be found on docs.scorecard.io. The full API of this library can be found in api.md.

It is generated with Stainless.

MCP Server

Use the Scorecard MCP Server to enable AI assistants to interact with this API, allowing them to explore endpoints, make test requests, and use documentation to help integrate this SDK into your application.

Note: You may need to set environment variables in your MCP client.

Installation

npm install scorecard-ai

Usage

The full API of this library can be found in api.md.

<!-- prettier-ignore -->

import Scorecard, { runAndEvaluate } from 'scorecard-ai';

async function runSystem(testcaseInput) {
  // Replace with a call to your LLM system
  return { response: testcaseInput.original.toUpperCase() };
}

const client = new Scorecard({
  apiKey: process.env['SCORECARD_API_KEY'],
});

const run = await runAndEvaluate(
  client,
  {
    projectId: '314', // Scorecard Project
    testsetId: '246', // Scorecard Testset
    metricIds: ['789', '101'], // Scorecard Metrics
    system: runSystem, // Your LLM system
  }
);

console.log(`Go to ${run.url} to view your Run's scorecard.`);

Request & Response types

This library includes TypeScript definitions for all request params and response fields. You may import and use them like so:

<!-- prettier-ignore -->

import Scorecard from 'scorecard-ai';

const client = new Scorecard({
  apiKey: process.env['SCORECARD_API_KEY'], // This is the default and can be omitted
});

const testset: Scorecard.Testset = await client.testsets.get('246');

Documentation for each method, request param, and response field are available in docstrings and will appear on hover in most modern editors.

Handling errors

When the library is unable to connect to the API, or if the API returns a non-success status code (i.e., 4xx or 5xx response), a subclass of APIError will be thrown:

<!-- prettier-ignore -->

const testset = await client.testsets.get('246').catch(async (err) => {
  if (err instanceof Scorecard.APIError) {
    console.log(err.status); // 400
    console.log(err.name); // BadRequestError
    console.log(err.headers); // {server: 'nginx', ...}
  } else {
    throw err;
  }
});

Error codes are as follows:

Retries

Certain errors will be automatically retried 2 times by default, with a short exponential backoff. Connection errors (for example, due to a network connectivity problem), 408 Request Timeout, 409 Conflict, 429 Rate Limit, and >=500 Internal errors will all be retried by default.

You can use the maxRetries option to configure or disable this:

<!-- prettier-ignore -->

// Configure the default for all requests:
const client = new Scorecard({
  maxRetries: 0, // default is 2
});

// Or, configure per-request:
await client.testsets.get('246', {
  maxRetries: 5,
});

Timeouts

Requests time out after 1 minute by default. You can configure this with a timeout option:

<!-- prettier-ignore -->

// Configure the default for all requests:
const client = new Scorecard({
  timeout: 20 * 1000, // 20 seconds (default is 1 minute)
});

// Override per-request:
await client.testsets.get('246', {
  timeout: 5 * 1000,
});

On timeout, an APIConnectionTimeoutError is thrown.

Note that requests which time out will be retried twice by default.

Auto-pagination

List methods in the Scorecard API are paginated. You can use the for await … of syntax to iterate through items across all pages:

async function fetchAllTestcases(params) {
  const allTestcases = [];
  // Automatically fetches more pages as needed.
  for await (const testcase of client.testcases.list('246', { limit: 30 })) {
    allTestcases.push(testcase);
  }
  return allTestcases;
}

Alternatively, you can request a single page at a time:

let page = await client.testcases.list('246', { limit: 30 });
for (const testcase of page.data) {
  console.log(testcase);
}

// Convenience methods are provided for manually paginating:
while (page.hasNextPage()) {
  page = await page.getNextPage();
  // ...
}

Advanced Usage

Accessing raw Response data (e.g., headers)

The "raw" Response returned by fetch() can be accessed through the .asResponse() method on the APIPromise type that all methods return. This method returns as soon as the headers for a successful response are received and does not consume the response body, so you are free to write custom parsing or streaming logic.

You can also use the .withResponse() method to get the raw Response along with the parsed data. Unlike .asResponse() this method consumes the body, returning once it is parsed.

<!-- prettier-ignore -->

const client = new Scorecard();

const response = await client.testsets.get('246').asResponse();
console.log(response.headers.get('X-My-Header'));
console.log(response.statusText); // access the underlying Response object

const { data: testset, response: raw } = await client.testsets.get('246').withResponse();
console.log(raw.headers.get('X-My-Header'));
console.log(testset.id);

Logging

[!IMPORTANT] All log messages are intended for debugging only. The format and content of log messages may change between releases.

Log levels

The log level can be configured in two ways:

1. Via the SCORECARD_LOG environment variable
2. Using the logLevel client option (overrides the environment variable if set)

import Scorecard from 'scorecard-ai';

const client = new Scorecard({
  logLevel: 'debug', // Show all log messages
});

Available log levels, from most to least verbose:

• 'debug' - Show debug messages, info, warnings, and errors
• 'info' - Show info messages, warnings, and errors
• 'warn' - Show warnings and errors (default)
• 'error' - Show only errors
• 'off' - Disable all logging

At the 'debug' level, all HTTP requests and responses are logged, including headers and bodies. Some authentication-related headers are redacted, but sensitive data in request and response bodies may still be visible.

Custom logger

By default, this library logs to globalThis.console. You can also provide a custom logger. Most logging libraries are supported, including pino, winston, bunyan, consola, signale, and @std/log. If your logger doesn't work, please open an issue.

When providing a custom logger, the logLevel option still controls which messages are emitted, messages below the configured level will not be sent to your logger.

import Scorecard from 'scorecard-ai';
import pino from 'pino';

const logger = pino();

const client = new Scorecard({
  logger: logger.child({ name: 'Scorecard' }),
  logLevel: 'debug', // Send all messages to pino, allowing it to filter
});

Making custom/undocumented requests

This library is typed for convenient access to the documented API. If you need to access undocumented endpoints, params, or response properties, the library can still be used.

Undocumented endpoints

To make requests to undocumented endpoints, you can use client.get, client.post, and other HTTP verbs. Options on the client, such as retries, will be respected when making these requests.

await client.post('/some/path', {
  body: { some_prop: 'foo' },
  query: { some_query_arg: 'bar' },
});

Undocumented request pa

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