Felt plugin

Use Felt through Corsair: one client, typed API calls. Felt authenticates via Personal Access Tokens provided as a Bearer token in the Authorization: Bearer <token> HTTP header. Generate a token in your Felt user account settings under Integrations & API (felt.com/settings). Provide this token as the key option when initializing the plugin or through Corsair’s key manager. Calls without a token throw AuthMissingError('felt', 'api_key'). Key concepts in Felt v2 API:

Maps: Maps are the central container in Felt. Every layer, element, comment, and print layout belongs to a map.
Layers & Sources: Layers visualize spatial vector or raster data from URLs, files, or database sources.
Elements: Freestanding annotations, pins, and GeoJSON features drawn directly on the map canvas.
Layer Components: Reusable legends, filters, and UI controls bound to map layers.
Rate Limits: Felt enforces a rate limit of 300 requests per minute per IP. When a rate limit is exceeded, Felt returns HTTP 429 with standard Retry-After. The plugin transport handles retries automatically.
Privacy: Sensitive database connection credentials provided when creating or updating data sources are strictly redacted from errors and event logs.

What you get:

69 typed API operations

Setup

Install

npm install corsair @corsair-dev/felt better-sqlite3
npm install --save-dev @types/better-sqlite3

yarn add corsair @corsair-dev/felt better-sqlite3
yarn add --dev @types/better-sqlite3

pnpm install corsair @corsair-dev/felt better-sqlite3
pnpm install --save-dev @types/better-sqlite3

bun add corsair @corsair-dev/felt better-sqlite3
bun add --dev @types/better-sqlite3

Add the plugin

corsair.ts

import Database from 'better-sqlite3';
import { createCorsair } from 'corsair';
import { felt } from '@corsair-dev/felt';

export const corsair = createCorsair({
	plugins: [
		felt(),
	],
	database: new Database('corsair.db'),
	kek: process.env.CORSAIR_KEK!,
	multiTenancy: true,
	hub: {
		projectApiKey: process.env.CORSAIR_API_KEY!,
		signingSecret: process.env.CORSAIR_SIGNING_SECRET!,
	},
});

With multiTenancy: true, scope calls with corsair.withTenant(id). See Quick start for KEK + Hub keys, and Multi-tenancy for account isolation.

Choose authentication

API Key (Recommended)

Store the Felt API key before the first call: pnpm corsair setup --plugin=felt --tenant=acme api_key=<your-key> (leave out --tenant without multiTenancy), or pass it as key in the plugin options. With Hub, each tenant enters their own key on the connect page. See API key auth.

felt()

More: API Key

Connect a tenant

Mint a connect link and send the tenant to it. Hub hosts the page and delivers the result to your app — see Connect / OAuth.

const { connectUrl } = await corsair.manage.connect.createLink({
	plugin: 'felt',
	tenantId: 'acme',
});
// redirect the user's browser to connectUrl

Example API calls

Get the authenticated Felt user profile

const tenant = corsair.withTenant('acme');
await tenant.felt.api.users.getCurrent({});

Create a new map

const tenant = corsair.withTenant('acme');
await tenant.felt.api.maps.create({
	title: 'Field Operations Map',
	lat: 37.7749,
	lon: -122.4194,
	zoom: 12,
});

See the full list on the API page.

What’s next

API reference

Every felt.api.* operation with input and output types.

Connect / OAuth

createLink, Hub delivery, and tenant connect flows.

Use with agents

Expose this plugin’s operations as MCP tools.

Overview

Plugins