Agent Relay Python SDK

Python SDK for two workflows:

  • Orchestrate mode spawns and manages AI agents from Python.
  • Communicate mode puts an existing agent framework on Relaycast with Relay + on_relay().

Installation

Orchestrate

pip install agent-relay-sdk

Communicate

pip install "agent-relay-sdk[communicate]"

The SDK ships per-platform wheels with the broker binary embedded. pip install is the network boundary — no downloads happen at import or first use. Communicate mode also needs the framework package you want to wrap, such as claude-agent-sdk, google-adk, agno, swarms, or crewai.

Requirements

  • Python 3.10+

  • A supported platform (the wheel ships a prebuilt agent-relay-broker):

    Platform Wheel tag
    macOS Apple Silicon macosx_11_0_arm64
    macOS Intel macosx_10_12_x86_64
    Linux x86_64 manylinux_2_17_x86_64.manylinux2014_x86_64
    Linux aarch64 manylinux_2_17_aarch64.manylinux2014_aarch64

    Linux binaries are built statically against musl, so they install on glibc and musl distros (Debian, Ubuntu, RHEL, Alpine, …). Other platforms (Windows, FreeBSD, linux-armv7) are unsupported — pip install will fail with "no matching distribution found".

    To override the bundled binary (e.g. for local development against a custom broker build), set BROKER_BINARY_PATH or AGENT_RELAY_BIN to an absolute path.

Development

For an editable install (pip install -e packages/sdk-py), build the broker locally and copy it into the wheel tree:

cargo build --release --bin agent-relay-broker
packages/sdk-py/scripts/sync-broker-dev.sh

The destination (src/agent_relay/bin/) is gitignored. Alternatively, set BROKER_BINARY_PATH=$(pwd)/target/release/agent-relay-broker in your shell.

Choose a Mode

Orchestrate

Use AgentRelay when you want Python to spawn agents, wait for readiness, route messages, and shut everything down.

import asyncio
from agent_relay import AgentRelay, Models

async def main():
    relay = AgentRelay(channels=["dev"])
    relay.on_message_received = lambda msg: print(f"[{msg.from_name}]: {msg.text}")

    await relay.claude.spawn(
        name="Reviewer",
        model=Models.Claude.OPUS,
        channels=["dev"],
        task="Review the PR and suggest improvements",
    )
    await relay.codex.spawn(
        name="Builder",
        model=Models.Codex.GPT_5_3_CODEX,
        channels=["dev"],
        task="Implement the suggestions",
    )

    await asyncio.gather(
        relay.wait_for_agent_ready("Reviewer"),
        relay.wait_for_agent_ready("Builder"),
    )
    await relay.shutdown()

asyncio.run(main())

Communicate

Use Relay + on_relay() when your framework already owns the runtime and you only want Relaycast messaging.

relay = Relay("Researcher")
agent = FrameworkAgent(...)
agent = on_relay(agent, relay)

Supported Python adapters:

  • OpenAI Agents
  • Claude Agent SDK
  • Google ADK
  • Agno
  • Swarms
  • CrewAI

The wrapped agent gets Relay tools for direct messages, channel posts, inbox reads, and agent discovery. Framework-specific receive hooks are added automatically.

API

AgentRelay

The main Orchestrate entry point. Pass channels to subscribe to message channels.

relay = AgentRelay(channels=["dev", "planning"])

Spawning Agents

Use runtime-specific spawners:

await relay.claude.spawn(name="Agent1", model=Models.Claude.SONNET, channels=["dev"], task="...")
await relay.codex.spawn(name="Agent2", model=Models.Codex.GPT_5_3_CODEX, channels=["dev"], task="...")
await relay.gemini.spawn(name="Agent3", model=Models.Gemini.GEMINI_2_5_PRO, channels=["dev"], task="...")

worker = await relay.claude.spawn(
    name="HookedWorker",
    channels=["dev"],
    on_start=lambda ctx: print(f"spawning {ctx['name']}"),
    on_success=lambda ctx: print(f"spawned {ctx['name']} ({ctx['runtime']})"),
    on_error=lambda ctx: print(f"failed to spawn {ctx['name']}: {ctx['error']}"),
)

await worker.release(
    "done",
    on_start=lambda ctx: print(f"releasing {ctx['name']}"),
    on_success=lambda ctx: print(f"released {ctx['name']}"),
)

Relay

The Communicate-mode client. Configure it directly or via RELAY_WORKSPACE, RELAY_API_KEY, and RELAY_BASE_URL.

from agent_relay import Relay

relay = Relay("Researcher")
await relay.send("Lead", "Status update")
await relay.post("docs", "Wave 5.1 complete")
messages = await relay.inbox()

human = relay.system()
await human.send_message(
    to="Agent1",
    text="Please start the analysis",
    # wait (default) queues for the next safe idle boundary and can remain
    # unread while the recipient is busy. steer requests immediate injection
    # and may interrupt active work. Send success confirms enqueue only.
    mode="wait",
)

on_relay()

Wrap a framework-owned agent or options object and keep the runtime you already use.

from agent_relay import Relay, on_relay

relay = Relay("Researcher")
wrapped = on_relay(framework_agent_or_options, relay)

Event Hooks

relay.on_message_received = lambda msg: ...       # New message
relay.on_agent_ready = lambda agent: ...          # Agent connected
relay.on_agent_exited = lambda agent: ...         # Agent exited
relay.on_agent_spawned = lambda agent: ...        # Agent spawned
relay.on_worker_output = lambda data: ...         # Agent output
relay.on_agent_idle = lambda agent: ...           # Agent idle

Models

Models.Claude.OPUS
Models.Claude.SONNET
Models.Claude.HAIKU

Models.Codex.GPT_5_2_CODEX
Models.Codex.GPT_5_3_CODEX

Models.Gemini.GEMINI_2_5_PRO
Models.Gemini.GEMINI_2_5_FLASH

License

Apache-2.0

Key dates

PyPI data
Data sourced directly from PyPI's database.
  • Released:
Newer release available (12.1.0)

1 maintainer

PyPI data
Data sourced directly from PyPI's database.
Avatar for khaliqgant from gravatar.com khaliqgant

License expression

Apache-2.0
View SPDX License List

Requires

Python >=3.10

Provides Extra

agno claude-sdk communicate crewai dev google-adk node openai-agents

Report project as malware

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distributions

No source distribution files available for this release.See tutorial on generating distribution archives.

Built Distributions

If you're not sure about the file name format, learn more about wheel file names.

agent_relay_sdk-11.6.4-py3-none-manylinux2014_x86_64.manylinux_2_17_x86_64.whl (6.7 MB view details)

Uploaded Python 3manylinux: glibc 2.17+ x86-64

agent_relay_sdk-11.6.4-py3-none-manylinux2014_aarch64.manylinux_2_17_aarch64.whl (7.5 MB view details)

Uploaded Python 3manylinux: glibc 2.17+ ARM64

agent_relay_sdk-11.6.4-py3-none-macosx_11_0_arm64.whl (6.0 MB view details)

Uploaded Python 3macOS 11.0+ ARM64

agent_relay_sdk-11.6.4-py3-none-macosx_10_12_x86_64.whl (6.5 MB view details)

Uploaded Python 3macOS 10.12+ x86-64

File details

Details for the file agent_relay_sdk-11.6.4-py3-none-manylinux2014_x86_64.manylinux_2_17_x86_64.whl.

File metadata

File hashes

Hashes for agent_relay_sdk-11.6.4-py3-none-manylinux2014_x86_64.manylinux_2_17_x86_64.whl
Algorithm Hash digest
SHA256 292463b979fda3ac38bedeb0608755a459b8fa44c8d8c73f38585edc08fe5127
MD5 49dbe5f1ac213db9276129089d878f1c
BLAKE2b-256 09fa2261d45c1c9a5d2acec2ae67a3bf97991ca079d069394d2b12b98dcc8490

See more details on using hashes here.

Provenance

The following attestation bundles were made for agent_relay_sdk-11.6.4-py3-none-manylinux2014_x86_64.manylinux_2_17_x86_64.whl:

Publisher: publish.yml on AgentWorkforce/relay

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

File details

Details for the file agent_relay_sdk-11.6.4-py3-none-manylinux2014_aarch64.manylinux_2_17_aarch64.whl.

File metadata

File hashes

Hashes for agent_relay_sdk-11.6.4-py3-none-manylinux2014_aarch64.manylinux_2_17_aarch64.whl
Algorithm Hash digest
SHA256 f196b7dcb90e86cdca6378b7f9785d758e7328689b77cb8b169bb60ea13124be
MD5 03f8a109be12e973990520dfaf1b126f
BLAKE2b-256 84c404b5062f45f60a4b5cbd68abb92e2907394745ccb8148f9990c36ffdd17d

See more details on using hashes here.

Provenance

The following attestation bundles were made for agent_relay_sdk-11.6.4-py3-none-manylinux2014_aarch64.manylinux_2_17_aarch64.whl:

Publisher: publish.yml on AgentWorkforce/relay

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

File details

Details for the file agent_relay_sdk-11.6.4-py3-none-macosx_11_0_arm64.whl.

File metadata

File hashes

Hashes for agent_relay_sdk-11.6.4-py3-none-macosx_11_0_arm64.whl
Algorithm Hash digest
SHA256 e5d22e0cf19a6f6ed3852f63ec9a755e1181b403acd8c8cf13a1ee7829fe55a9
MD5 41af583a1969b7dc21d30fc994c0f86a
BLAKE2b-256 e8e6df995a9dd3000fc94a873a0c7a420214638a399e624e7848a97a418d9a18

See more details on using hashes here.

Provenance

The following attestation bundles were made for agent_relay_sdk-11.6.4-py3-none-macosx_11_0_arm64.whl:

Publisher: publish.yml on AgentWorkforce/relay

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

File details

Details for the file agent_relay_sdk-11.6.4-py3-none-macosx_10_12_x86_64.whl.

File metadata

File hashes

Hashes for agent_relay_sdk-11.6.4-py3-none-macosx_10_12_x86_64.whl
Algorithm Hash digest
SHA256 8794cb03bd0ec39063c0f30abe719afabfce0ac11d3d8bb99888d3f8431accfc
MD5 275dd188d141de6c37dffd64da7c1dd7
BLAKE2b-256 77efa57e5fa30ba21b30d525916134fbb05df5da377cb80cd05991c353becfd0

See more details on using hashes here.

Provenance

The following attestation bundles were made for agent_relay_sdk-11.6.4-py3-none-macosx_10_12_x86_64.whl:

Publisher: publish.yml on AgentWorkforce/relay

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Release history Release notifications | RSS feed

12.1.0

4 files

12.0.0

4 files

11.10.4

4 files

11.10.3

4 files

11.10.2

4 files

11.10.1

4 files

11.9.0

4 files

11.8.7

4 files

11.8.6

4 files

11.8.5

4 files

11.8.4

4 files

11.8.3

4 files

11.8.2

4 files

11.8.1

4 files

11.8.0

4 files

11.7.2

4 files

11.7.1

4 files

11.7.0

4 files

11.6.10

4 files

11.6.9

4 files

11.6.7

4 files

11.6.6

4 files

11.6.5

4 files

This release

11.6.4 This release

4 files

11.6.3

4 files

11.6.2

4 files

11.6.1

4 files

11.6.0

4 files

11.5.6

4 files

11.5.5

4 files

11.5.4

4 files

11.5.3

4 files

11.5.2

4 files

11.5.1

4 files

11.5.0

4 files

11.4.3

4 files

11.4.2

4 files

11.4.1

4 files

11.4.0

4 files

11.3.1

4 files

11.3.0

4 files

11.2.0

4 files

11.1.1

4 files

11.1.0

4 files

11.0.2

4 files

11.0.1

4 files

11.0.0

4 files

10.6.7

4 files

10.6.6

4 files

10.6.5

4 files

10.6.4

4 files

10.6.3

4 files

10.6.2

4 files

10.6.1

4 files

10.6.0

4 files

10.5.0

4 files

10.4.0

4 files

10.3.0

4 files

10.2.0

4 files

10.1.0

4 files

10.0.0

4 files

9.2.4

4 files

9.2.3

4 files

9.2.2

4 files

9.2.1

4 files

9.2.0

4 files

9.1.10

4 files

9.1.9

4 files

9.1.8

4 files

9.1.7

4 files

9.1.6

4 files

9.1.5

4 files

9.1.4

4 files

9.1.3

4 files

9.1.2

4 files

9.1.1

4 files

9.1.0

4 files

9.0.2

4 files

9.0.1

4 files

9.0.0

4 files

8.9.2

4 files

8.9.1

4 files

8.9.0

4 files

8.8.5

4 files

8.8.4

4 files

8.8.3

4 files

8.8.2

4 files

8.8.1

4 files

8.8.0

4 files

8.7.2

4 files

8.7.1

4 files

8.7.0

4 files

8.6.0

4 files

8.5.0

4 files

8.4.0

4 files

8.3.7

4 files

8.3.6

4 files

8.3.5

4 files

8.3.4

4 files

8.3.3

4 files

8.3.2

4 files

8.3.1

4 files

8.3.0

4 files

8.2.0

4 files

8.1.2

4 files

8.1.1

4 files

8.1.0

4 files

8.0.5

4 files

8.0.4

4 files

8.0.3

4 files

8.0.2

4 files

8.0.1

4 files

8.0.0

4 files

7.1.1

4 files

7.1.0

4 files

7.0.1

4 files

7.0.0

4 files

6.3.6

4 files

6.3.5

4 files

6.3.4

4 files

6.3.3

4 files

6.3.2

4 files

6.3.1

4 files

6.3.0

4 files

6.2.8

4 files

6.2.7

4 files

6.2.6

4 files

6.2.5

4 files

6.2.4

4 files

6.2.3

4 files

6.2.2

4 files

6.2.1

4 files

6.2.0

4 files

6.0.22

4 files

6.0.21

4 files

6.0.20

4 files

6.0.19

4 files

6.0.18

4 files

6.0.17

4 files

6.0.16

4 files

6.0.15

4 files

6.0.14

4 files

6.0.13

4 files

6.0.12

4 files

6.0.11

4 files

6.0.10

4 files

6.0.9

4 files

6.0.8

4 files

6.0.7

4 files

6.0.6

4 files

6.0.5

4 files

6.0.4

4 files

6.0.3

4 files

6.0.2

4 files

6.0.1

4 files

6.0.0

4 files

5.0.0

4 files

4.0.40

2 files

4.0.39

2 files

4.0.38

2 files

4.0.37

2 files

4.0.36

2 files

4.0.35

2 files

4.0.34

2 files

4.0.33

2 files

4.0.32

2 files

4.0.31

2 files

4.0.30

2 files

4.0.29

2 files

4.0.28

2 files

4.0.27

2 files

4.0.26

2 files

4.0.25

2 files

4.0.24

2 files

4.0.23

2 files

4.0.22

2 files

4.0.21

2 files

4.0.20

2 files

4.0.19

2 files

4.0.18

2 files

4.0.17

2 files

4.0.16

2 files

4.0.15

2 files

4.0.14

2 files

4.0.13

2 files

4.0.12

2 files

4.0.11

2 files

4.0.10

2 files

4.0.9

2 files

4.0.8

2 files

4.0.7

2 files

4.0.6

2 files

4.0.5

2 files

4.0.4

2 files

4.0.3

2 files

4.0.2

2 files

4.0.1

2 files

4.0.0

2 files

3.2.22

2 files

3.2.21

2 files

3.2.20

2 files

3.2.19

2 files

3.2.18

2 files

3.2.17

2 files

3.2.16

2 files

3.2.15

2 files

3.2.14

2 files

3.2.13

2 files

3.2.12

2 files

3.2.11

2 files

3.2.10

2 files

3.2.9

2 files

3.2.8

2 files

3.2.7

2 files

3.2.6

2 files

3.2.5

2 files

3.2.4

2 files

3.2.3

2 files

3.2.2

2 files

3.2.1

2 files

3.2.0

2 files

3.1.23

2 files

3.1.22

2 files

3.1.21

2 files

3.1.20

2 files

3.1.19

2 files

3.1.18

2 files

3.1.17

2 files

3.1.16

2 files

3.1.15

2 files

3.1.14

2 files

3.1.13

2 files

3.1.12

2 files

3.1.11

2 files

3.1.10

2 files

3.1.9

2 files

3.1.8

2 files

3.1.7

2 files

3.1.6

2 files

3.1.5

2 files

3.1.4

2 files

3.1.3

2 files

3.1.2

2 files

3.1.1

2 files

3.1.0

1 file

3.0.2

2 files

2.4.7

2 files

2.4.6

2 files

2.4.5

2 files

2.4.4

2 files

2.4.2

2 files

2.4.1

2 files

2.4.0

2 files

2.3.16

2 files

2.3.15

2 files

Anthropic, PBC Visionary sponsor Bloomberg Visionary sponsor Hudson River Trading Visionary sponsor Meta Visionary sponsor NVIDIA Visionary sponsor Microsoft Sustainability sponsor Depot Continuous Integration AWS Cloud computing and Security Sponsor Datadog Monitoring Fastly CDN Google Download Analytics Sentry Error logging StatusPage Status page