Is A2A / Agent2Agent Protocol safe?
A2A / Agent2Agent Protocol scores 88.4/100 (Grade A), ranked #10 of 328 tracked open-source AI agent projects, on evidence coverage A (4 of 5 independent signal types).
The public evidence: its packages ship with cryptographic provenance;
OSSF Scorecard rates its supply-chain practices 7.0/10;
99% of recent commits are signed;
last pushed 2026-07-09. Every point is earned from checkable signals — never paid placement. How scoring works →
Quick Trust Read
Verdict
Strong public trust posture, backed by multiple independent signals.
88.4/100 · Grade A
Strongest Signal
Identity / Provenance
18.0/18
Weakest Signal
Maintenance
16.3/20
What Would Improve It
Improve maintenance to lift the weakest part of the trust profile.
Maintainer Checklist
Keep signals currentTrust posture is already in a healthy range. The main job is to keep provenance, maintenance, and public evidence fresh.
How to read this: HVTrust (0–100) weighs supply-chain signals (provenance, OSSF Scorecard, signed commits, open license) alongside real-world adoption. Grade A reflects the trust score band: A ≥ 80, B ≥ 65, C ≥ 50, D < 50. Evidence coverage A is separate — it grades how many independent signal types back the score (4 of 5), so a high score on thin evidence stays visible. Full methodology →
Signals refreshed2026-07-11 04:00 UTC·Repo last pushed 2 days ago
Rank Trend
2026-07-052026-07-11
Activity & Reach
Stars
24.7k
Forks
2.5k
Last Push
2026-07-09
2 days ago
Commits (4 wk)
12
Downloads (7d)
2,615,893
pypi
HN mentions (30d)
0
Open Issues
167
Rank Change
=
was #10
Analysis
HVTrust Dimensions
88.4 / 100 · 100.0% confidence
Safety / IntegrityOSSF, provenance, signatures
21.2 / 25
Identity / ProvenanceListing and build link
18.0 / 18
TransparencyLicense and public checks
14.4 / 17
MaintenanceFreshness and commits
16.3 / 20
AdoptionStars and downloads
19.1 / 20
Activity Inputs
81.0 / 100
StarsRepository reach
26.4 / 30
FreshnessLast push recency
24.7 / 25
ActivityRecent commits
13.9 / 25
CommunityFork signal
15.8 / 20
Supply Chain Trust
Package Provenance
Verified
pypi attestation
OSSF Scorecard
7.0 / 10
OpenSSF Scorecard · scanned Jul 10, 2026
Signed Commits
99%
of last 100 commits verified
Binary-Artifacts10
Branch-Protection8
CI-Tests9
CII-Best-Practices0
Code-Review9
Contributors10
Dangerous-Workflow10
Dependency-Update-Tool10
Fuzzing0
License10
Maintained10
Packaging-1
Pinned-Dependencies0
SAST0
Security-Policy9
Signed-Releases-1
Token-Permissions0
Vulnerabilities10
Is A2A / Agent2Agent Protocol safe?
Public supply-chain signals for A2A / Agent2Agent Protocol are strong: it has multiple independent trust indicators in place. This does not replace your own security review, but A2A / Agent2Agent Protocol carries less obvious unverified-evidence risk than projects with thin signals.
Does A2A / Agent2Agent Protocol publish package provenance?
Yes. A2A / Agent2Agent Protocol's package releases carry build provenance attestations, which cryptographically link the published package back to its source repository and CI workflow.
Does A2A / Agent2Agent Protocol have an OpenSSF Scorecard?
A2A / Agent2Agent Protocol has an OpenSSF Scorecard score of 7.0/10. The Scorecard checks for branch protection, signed releases, dependency updates, fuzzing, code review, and other supply-chain hygiene items. See the full check breakdown on this page.
Is A2A / Agent2Agent Protocol actively maintained?
Actively maintained. The repository was pushed to within the last 2 day(s).
What license does A2A / Agent2Agent Protocol use?
A2A / Agent2Agent Protocol ships under Apache-2.0. A declared, OSI-approved license is one of the transparency signals HVTrust scores.
Are A2A / Agent2Agent Protocol's commits signed?
99% of the last 100 commits to A2A / Agent2Agent Protocol are verified-signed (GPG, SSH, S/MIME, or GitHub's signing flow). Signed commits help confirm that code was authored by who the commit claims.
Not a safety endorsement. HVTracker describes what public signals show, not whether a project is safe for your use case. Run your own security review before adopting in production.
These runtime-trust fields — detected from public repo docs and manifests — contribute a bounded adjustment to this project's HVTrust score alongside supply-chain evidence. The exact values each field can add or subtract are documented in the methodology → Compare this surface across every listed agent in the capability matrix →
MCP Server Support
None detected
No MCP server signal detected.
Detailed evidence is not shown in the public view.
External Service Dependencies
None detected
No clear third-party provider dependency detected.
Credential signal:
No explicit API-key/config marker detected.
Tool / Plugin Surface
high confidence
Declared
Declared plugin/integration surface detected.
code
Detailed evidence is not shown in the public view.
Package Provenance Drift
low confidence
Unknown
Package source metadata is missing or inconclusive
Detailed evidence is not shown in the public view.
MCP signal live
External deps live
Tool / plugin surface live
Package provenance drift live
How this surface has changed
Detected changes to A2A / Agent2Agent Protocol's runtime surface and supply-chain posture, from daily public-signal snapshots. A change here means our detectors see something different — a genuinely changed capability, or better evidence of an existing one.
HVTrust scores A2A / Agent2Agent Protocol from public signals only — we never contact maintainers first. If a signal is wrong, stale, or missing (provenance you publish, a Scorecard you run, signed releases), tell us and we'll review it. Corrections are public and tracked on GitHub.
