Agent2Agent (A2A) Protocol
Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications. observed · 2026-08-28
Health v2 · maintenance only
82/100
- Activity 99
- Release rhythm 86
- Longevity 37
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 12.0
- age_days: 526
- days_rel: 97
- days_push: 8
- n_releases_24m: 11
Adoption not part of the score
25503 stars · 2586 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Agent2Agent (A2A) is an open protocol, hosted under the Linux Foundation, that standardizes communication and interoperability between opaque agentic applications. It includes a protocol specification, a Python SDK (a2a-sdk), and sample implementations for building A2A-compatible agents and servers.
Use cases
- make my ai agent talk to other agents
- standard protocol for agent-to-agent communication
- build an a2a-compatible agent server in python
- interoperate agents from different frameworks
- expose my agent as a service other agents can call
- replace custom agent integration glue with an open standard
When to choose
- You need agents built on different frameworks or vendors to communicate without sharing internals
- You want a Linux Foundation-backed open standard with an official Python SDK and samples
- You are exposing an agent as a networked service discoverable by other agents
When to avoid
- You only need a single agent calling tools within one process - MCP or a plain SDK is simpler
- You need agent-to-tool integration rather than agent-to-agent communication
- Your stack has no SDK support yet and implementing the protocol from spec is too costly
Facets
library · maturity active
agent-framework rpc api-framework sdk large-language-models apis artificial-intelligence python cross-platform a2a-protocol agent-interop agent-communication linux-foundation protocol-specification generative-ai ai-agents
2 sources
- readme: https://github.com/a2aproject/A2A · fetched 2026-08-28 · f4e4c3e6116a
- homepage: https://a2a-protocol.org/ · fetched 2026-08-29 · 36c6c3c2e4f9
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| a2aproject/A2A | main | 82 |
| a2aproject/a2a-python | sdk | 86 |
| a2aproject/a2a-samples | examples | 72 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem