postbag is an open-source project built for developers building or coordinating multi-agent coding workflows.

Does postbag have a free plan?

Yes — postbag is open source under the MIT license and free to use.

What platforms does postbag run on?

postbag runs on the command line. It can also be self-hosted.

Is postbag still maintained?

The GitHub repository shows 66 commits in the last 90 days.

What are alternatives to postbag?

Similar projects tracked by PulseGate include llm-agent-playbook, Contentosapp Studio, and Fibonacci.

postbag is developed by parasxos.

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postbag

Name: postbag
Author: parasxos

PyPIInfrastructure

postbag is an MIT-licensed command-line tool that lets Claude Code and Codex sessions exchange letters through one shared bag. It is designed for agent-to-agent coordination without running a daemon, polling, or hooks.

Open SourceMITCLISelf-hosted

Visit PyPI

Overview

8 features

postbag is a Multi-agent & orchestration project. It focuses on coordinating messages between separate Claude Code or Codex agent sessions without a daemon, polling, or hooks. It is built as an open-source project for developers building or coordinating multi-agent coding workflows. postbag is open source under the MIT license. postbag is available on the command line, and it can be self-hosted.

Behind postbag is parasxos, and it first shipped in 2026. Development happens publicly on GitHub with 66 commits in the last 90 days. Among its 8 catalogued features are letter exchange, shared message bag, and agent-to-agent messaging.

Summary written by a language model from the project’s public pages.

Letter exchange
Shared message bag
Agent-to-agent messaging
Claude Code support
Codex support
Daemon-free operation
Polling-free operation
Hook-free operation

Built with & integrations

Runs on

CLISelf-hosted

Trust & compliance

License

MIT

Verified signals

HTTPSOpen SourceFree tierGitHubActive maintenance

Indexing history

What PulseGate has recorded for this listing

Indexed9 Sept · 16:49 UTC
postbag verified via PyPI Bulk Enumerator
Source: PyPI Bulk Enumerator · Open

Frequently asked questions about postbag

What is postbag?: Postbag focuses on coordinating messages between separate Claude Code or Codex agent sessions without a daemon, polling, or hooks. It is catalogued under Multi-agent & orchestration on PulseGate.
Who is postbag for?: postbag is an open-source project built for developers building or coordinating multi-agent coding workflows.
Does postbag have a free plan?: Yes — postbag is open source under the MIT license and free to use.
What platforms does postbag run on?: postbag runs on the command line. It can also be self-hosted.
Is postbag still maintained?: The GitHub repository shows 66 commits in the last 90 days.
What are alternatives to postbag?: Similar projects tracked by PulseGate include llm-agent-playbook, Contentosapp Studio, and Fibonacci.llm-agent-playbook Contentosapp Studio Fibonacci
Who makes postbag?: postbag is developed by parasxos.
When did postbag launch?: postbag first shipped in 2026.

At a glance

Platforms: CLI
Languages: English
Open source: Yes (GitHub)
License: MIT
First seen: 9 Sept 2026
Built for: developers building or coordinating multi-agent coding workflows
Model: Open source
Solves: Coordinating messages between separate Claude Code or Codex agent sessions without a daemon, polling, or hooks.

Registered as

GitHub: parasxos/postbag
PyPI: postbag

Developer

parasxos

Solo developer

GitHub

Open source

View on GitHub

Stars: 0
Forks: 0
Open issues: 0
Last commit: 9 Sept 2026
Commits 90d: 66
Contributors: 1
Authorship: Solo
Default branch: main
Latest release: v1.2.1 · 9 Sept 2026

Index record

Indexed: 9 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 9 Sept 2026

Identity audit (13)

Slug: postbag-pypi-org
Lifecycle state recorded: 9 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 9 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model from page content.
Last updated: 9 Sept 2026
Canonical URL: https://pypi.org/project/postbag

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