A2A A2A 0.3 v1.0.0

Limitguard

docs.limitguard.ai · Limitguard

Limitguard is a lead validation service for lead generation agencies, sales agents and their clients: it checks the company behind each lead against the official business registers (KVK in the Netherlands, KBO in Belgium), EU VAT (VIES) and the OFAC, EU and UN sanctions lists, and returns proceed, review or block with the source on every line. Developers and AI agents can use the same checks over its HTTP API, MCP server and A2A service, hosted in the EU.

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Verify the domain docs.limitguard.ai via a single DNS TXT record to add the verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.

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🔔 Watch this agent. Choose one alert: availability and recovery, card drift, price, payment rail, settlement wallet, inflow or verification changes. Add more alert types from your account. Free and unmetered on agents you've verified owning; 3 watches on agents you don't own, 25 on Pro. Sign in to watch

Trust score

55/100

grade D · 9 criteria

Uptime

100.0%

58 direct probes · 30d

Observed inflow · 30d

—

no payment wallet declared

Dispute or improve this rating

D

Conformance score: 55/100

D-grade: significant issues, auth-gated, partially broken, or stale.

click to expand breakdown click to collapse breakdown

pass Valid AgentCard 10/10

Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).

partial Live JSON-RPC 10/25

Card declares only gRPC / HTTP+JSON interfaces; the live probe covers JSON-RPC, so the endpoint was not exercised. Not a defect in the card.

            How to earn +15 points
          

Respond live on JSON-RPC

Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload. If your endpoint already answers, nothing is broken at your end: a stored result older than 30 days is scored as dated, and the points come back on the next probe.

Docs

partial Protocol version 5/10

Declares pre-1.0 A2A 0.3 (Google preview). Upgrade to v1.x for full points.

            How to earn +5 points
          

Declare protocolVersion

Add `"protocolVersion": "1.0"` (Major.Minor, no patch number — §3.6) to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.

Docs

info JWS signature 0/10

Card is unsigned (most published agents are).

pass Uptime track record 15/15

58/58 probes succeeded (100% uptime).

partial Skill declaration 6/10

Declares 1 skill, usable but thin. 1 skill without tags — optional in 0.x, REQUIRED once you move the card to v1.0.

            How to earn +4 points
          

Declare your skills

Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags` — `description` and `tags` are REQUIRED on AgentSkill since A2A v1.0, and tags are what discovery filters match on. We canonicalise these into the global skill taxonomy on next probe.

Docs

partial Verified Identity 5/10

Provider declared: Limitguard (https://docs.limitguard.ai/). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.

            How to earn +5 points
          

Verify your domain ownership

Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.

Docs

pass Freshness + modern flags 4/5

seen in upstream source within 0d

info Security declaration 0/5

Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.

Card drift detected. This agent's agent-card.json changed within the last 7 days. We track these so downstream callers can react.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Card history

8 snapshots drifted 7× Every change to agent-card.json

Agent card snapshots
Captured	Hash	Snapshot
2026-10-23 08:45:31 current	`13f84ee05018…`	view →
2026-10-16 03:41:21	`974d5a0df76d…`	view →
2026-10-12 08:24:17	`00eb85237371…`	view →
2026-10-07 14:32:07	`1958506d3460…`	view →
2026-10-03 08:18:55	`5f461dba5ad0…`	view →
2026-09-27 15:22:04	`465dde063224…`	view →
2026-09-10 21:36:56	`26b0772069b3…`	view →
2026-09-09 02:31:21	`0cbce3384741…`	view →

Uptime

100.0%

58 direct probes · 30d

Response

227ms

last direct probe

Skills

declared

Streaming

—

SSE-capable

Endpoints

Agent card	`https://docs.limitguard.ai/.well-known/agent-card.json`
Provider	https://docs.limitguard.ai/
Docs	https://docs.limitguard.ai/

About this provider off-card enrichment

SSL certificate

Let's Encrypt

expires 2026-11-23

Discovered via

manifests recrawl_hot recrawl_warm

Skills · 1 declared by this agent

These skills are declared by the agent. A taxonomy link appears only when we can classify a skill confidently.

limitguard

Use when verifying company trust, checking leads against business

No taxonomy category yet

Health · last 30 probes

When	HTTP	Live JSON-RPC	Latency
2026-10-26 14:52:22	200	—	227ms
2026-10-26 01:00:22	200	—	188ms
2026-10-25 12:18:57	200	—	175ms
2026-10-24 22:12:44	200	—	66ms
2026-10-24 10:24:41	200	—	196ms
2026-10-23 21:11:55	200	—	157ms
2026-10-23 08:45:31	200	—	175ms
2026-10-22 19:58:00	err	—	—
2026-10-22 06:07:09	200	—	177ms
2026-10-21 17:35:36	200	—	62ms

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Embed your Agenstry badge

Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.

Markdown / HTML snippets

[![Agenstry grade](https://agenstry.com/badge/docs.limitguard.ai.svg)](https://agenstry.com/agents/docs.limitguard.ai)
[![Verified Business](https://agenstry.com/badge/docs.limitguard.ai/identity.svg)](https://agenstry.com/agents/docs.limitguard.ai)
[![Uptime](https://agenstry.com/badge/docs.limitguard.ai/uptime.svg)](https://agenstry.com/agents/docs.limitguard.ai)
[![A2A version](https://agenstry.com/badge/docs.limitguard.ai/protocol.svg)](https://agenstry.com/agents/docs.limitguard.ai)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history

Raw agent card JSON

{
  "name": "Limitguard",
  "description": "Limitguard is a lead validation service for lead generation agencies, sales agents and their clients: it checks the company behind each lead against the official business registers (KVK in the Netherlands, KBO in Belgium), EU VAT (VIES) and the OFAC, EU and UN sanctions lists, and returns proceed, review or block with the source on every line. Developers and AI agents can use the same checks over its HTTP API, MCP server and A2A service, hosted in the EU.",
  "url": "https://docs.limitguard.ai/",
  "version": "1.0.0",
  "protocolVersion": "0.3",
  "preferredTransport": "HTTP+JSON",
  "supportedInterfaces": [
    {
      "url": "https://docs.limitguard.ai/",
      "protocolBinding": "HTTP+JSON",
      "protocolVersion": "0.3"
    }
  ],
  "provider": {
    "url": "https://docs.limitguard.ai/",
    "organization": "Limitguard"
  },
  "documentationUrl": "https://docs.limitguard.ai/",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false
  },
  "defaultInputModes": [
    "text/plain"
  ],
  "defaultOutputModes": [
    "text/plain"
  ],
  "skills": [
    {
      "id": "limitguard",
      "name": "limitguard",
      "description": "Use when verifying company trust, checking leads against business",
      "tags": [],
      "url": "https://docs.limitguard.ai/.well-known/agent-skills/limitguard/skill.md"
    }
  ]
}

Activity (audit trail)

Card history

Endpoints

Skills · 1 declared by this agent

Health · last 30 probes

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