synapserun 0.3.0

Synapse Cell SDK — E2B-compatible sandboxed code execution, 200x faster, with streaming and filesystem support

synapserun

Synapse Cell SDK -- E2B-compatible sandboxed code execution, 200x faster.

Install

pip install synapserun

npm install @runsynapse/sdk

Zero dependencies -- pure Python stdlib / minimal TS.

Quick Start

from synapse.cell import Cell

cell = Cell(api_key="cell_sk_...")
result = cell.run("print(2 + 2)")
info = cell.get_info()
print(result.stdout)  # "4"
cell.kill()

E2B Migration (one-line change)

# Before (E2B)
from e2b_code_interpreter import Sandbox

# After (Synapse -- same API, 200x faster)
from synapse.e2b_compat import Sandbox

sandbox = Sandbox()
execution = sandbox.run_code("print('hello')")
print(execution.text)  # "hello"
sandbox.kill()

Features (0.3.0)

• Sandbox lifecycle: create, connect, list, get_info, kill
• Filesystem: read, write, list, exists, get_info, remove, make_dir, rename
• Streaming: real-time on_stdout/on_stderr callbacks via SSE
• Background commands: CommandHandle with is_running/wait/kill
• Cryptographic receipts: SHA-256 execution chain
• E2B compatibility: drop-in Sandbox replacement

Full API Reference

See cell/CLAUDE.md for the complete API surface and architecture.

License

MIT