Can other agents read your agent card?

An agent introduces itself with a card published at /.well-known/agent-card.json. It is the only document another agent reads before deciding to call you. This tool fetches it, checks it against the specification, and shows you the detail.

Card unusable as it stands

An agent reading this card cannot act on it.

What the card declares

Name: Arca
Provider: arcabot.ai
Agent version: 0.4.0
Transport: JSONRPC
Endpoint: https://arcabot.ai
Card shape: pre-v1.0
Location: standard location
Skills: 4
Response time: 106 ms

Findings

ErrorRequired field missing: protocolVersionprotocolVersion
ErrorRequired field missing: provider.urlprovider.url
ErrorRequired field missing: skills[0].tagsskills[0].tags
ErrorRequired field missing: skills[1].tagsskills[1].tags
ErrorRequired field missing: skills[2].tagsskills[2].tags
ErrorRequired field missing: skills[3].tagsskills[3].tags
WarningdefaultInputModes[0] is not a media type in the form type/subtypedefaultInputModes[0]
WarningdefaultOutputModes[0] is not a media type in the form type/subtypedefaultOutputModes[0]
WarningCard written in the shape used before v1.0 of the protocol
NoteCard not signed: nothing attests that it comes from its authorsignatures
Noteurl moved to supportedInterfaces[0].url in v1.0url

How to fix it

protocolVersionThe A2A version the agent speaks, in the shape used before v1.0.
```
"protocolVersion": "0.3"
```

provider.urlA page about the provider, alongside its name.

"provider": {"organization": "ACME", "url": "https://acme.example"}

skills[0].tagsKeywords describing the skill. They are what a capability search matches on, so an empty list makes the skill hard to find.
```
"tags": ["cooking", "recipes"]
```
skills[1].tagsKeywords describing the skill. They are what a capability search matches on, so an empty list makes the skill hard to find.
```
"tags": ["cooking", "recipes"]
```
skills[2].tagsKeywords describing the skill. They are what a capability search matches on, so an empty list makes the skill hard to find.
```
"tags": ["cooking", "recipes"]
```
skills[3].tagsKeywords describing the skill. They are what a capability search matches on, so an empty list makes the skill hard to find.
```
"tags": ["cooking", "recipes"]
```

Declared skills

Agent InfrastructureA3Stack SDK for agent identity, discovery, payments, data, and accounts
OpenClaw RepairClawFix diagnostics and AI-assisted repair for OpenClaw installations
Multi-Chain IdentityERC-8004 identity registered on 23 chains: 22 EVM networks plus Solana
Crypto/AI ResearchResearch on agent payments, ERC-8004, ERC-8183, MEV, and agent economics

Show the result

This badge follows your readings: it changes when your card changes. Paste it in your README.

Markdown

[![A2A card](https://kopass.app/a2a/badge/aHR0cHM6Ly9hcmNhYm90LmFp.svg)](https://kopass.app/a2a/validator?url=https://arcabot.ai)

HTML

<a href="https://kopass.app/a2a/validator?url=https://arcabot.ai"><img src="https://kopass.app/a2a/badge/aHR0cHM6Ly9hcmNhYm90LmFp.svg" alt="A2A card" height="20"></a>

The rules come from the protocol's specification/a2a.proto file, where every required field is marked as such. Nothing is added.

Cards read here feed the KoPass daily reading: 229 agents followed, 224 of which answered on the last pass.

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