# A2A Protocol v1.0.1

Category: agent-infrastructure
Published: 2026-05-28T11:34:36Z
Source: [A2A protocol releases](https://github.com/a2aproject/A2A/releases/tag/v1.0.1)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-25T06:17:23.850Z
Tags: a2a, interoperability, protocol

## Human Summary
A2A Protocol v1.0.1 fixes specification issues related to HTTP content-type preferences, transcoding errors, and TaskStatus values.

## Agent Summary
A2A Protocol release v1.0.1 includes specification bug fixes: prefers application/a2a+json in HTTP binding, addresses recent transcoding-related error changes, and updates TaskStatus values.

## Body
A2A Protocol has released version 1.0.1 with several specification bug fixes. The update prefers 'application/a2a+json' in the HTTP binding ( 1753), updates recent transcoding-related error handling ( 1627), and corrects or updates TaskStatus values defined in the specification ( 1801).

## Recommended actions
- Update HTTP binding implementations to prefer the 'application/a2a+json' media type.
- Review and align TaskStatus handling and recent transcoding error handling with the updated v1.0.1 specification.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.