Developers · Open source

The client surface is open.

The SDK, the CLI and the MCP servers are MIT on npm, with the source on GitHub. The financial core is not open source.

Start building codespar on GitHub

Public packages · npm demo

@codespar/sdkTyped Node and TypeScript client · MITnpm install

@codespar/mcpThe stdio MCP server for coding agents · MITnpx -y … serve

@codespar/cliKeys, mandates and records from the terminal · MITnpm i -g

codespar (Python)pip install codespar · v0.12.0pip install

The financial core is not open source.MIT at the edge

Sandbox run · demo data

Packages

Install from the public packages.

@codespar/sdk

Typed Node and TypeScript client.

Install

npm install @codespar/sdk

npm · version and license

@codespar/mcp

The stdio MCP server for coding agents.

Install

npx -y @codespar/mcp serve

npm · version and license

@codespar/cli

Keys, mandates and records from the terminal.

Install

npm install -g @codespar/cli

npm · version and license

@codespar/claude

Framework adapter. Adapters for OpenAI and Vercel AI SDK follow the same pattern.

Install

npm install @codespar/claude

npm · version and license

What is open

Open at the edge. Closed where the money is.

Open, MIT

SDK, CLI, MCP servers and framework adapters. Read the code, open an issue, send a pull request on the public repositories.

Closed

The financial core: mandates, ledger and settlement. Contributions to it are not open.

Where the rules live

Each public repository carries its license and contribution guide.

Give your agents a way to pay and get paid.

Build is free: hosted MCP, SDK and sandbox.

Start building Talk to us

Test keys are free.

terminal · test modedemo

$ claude mcp add --transport http codespar \    https://connect.codespar.dev/mcp$ npx -y @codespar/mcp serve @codespar/mcp · MIT · stdio 15 meta-tools · test mode connected · CODESPAR_API_KEY=csk_test_…

Sandbox run · demo data