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A2A live JSON-RPC A2A 0.3.0 v1

Backflow Testers

backflowtesters.fyi

Find a backflow tester for your property. Ask a question in plain text and get the matching backflow testers, each with its page URL. For tool access, use the MCP server at https://backflowtesters.fyi/mcp.

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Trust score
50/100
grade D · 9 criteria
Uptime
accumulating
1/5 direct probes · 30d
~873 ms response
Observed inflow · 30d
—
no payment wallet declared
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
2 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

D
Conformance score: 50/100
D-grade: significant issues, auth-gated, partially broken, or stale.
Show breakdown Hide breakdown
pass Valid AgentCard 10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
pass Live JSON-RPC 25/25
Endpoint responds to a negotiated A2A SendMessage probe (answers in ~873 ms).
partial Protocol version 5/10
Declares pre-1.0 A2A 0.3.0 (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).
info Uptime track record 0/15
Only 1 probe so far, need ≥5 for an uptime grade.
partial Skill declaration 6/10
Declares 2 skill, usable but thin.
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
fail Verified Identity 0/10
No provider organisation declared. Anonymous agent.
How to earn +10 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 changed in the last 7 days. See history.

Activity

last 24h · 0 invocations No personal data recorded

No activity in the last 7 days.

Card history

2 snapshots drifted 1×
Snapshots
Agent card snapshots
Captured Hash Snapshot
2026-11-11 09:36:27 current 6f96cf41cfd9… view →
2026-11-11 05:54:33 fbe97d3ac448… view →
Uptime
accumulating
1 direct probes · 30d
Response
407ms
last direct probe
Skills
2
declared
Streaming
—
SSE-capable

Try it

Sent live, through Agenstry.

calling agent… ⌘/Ctrl + Enter

Endpoints

Agent cardhttps://backflowtesters.fyi/.well-known/agent-card.json
Docshttps://backflowtesters.fyi/developers
Discovered via
a2aregistry registry

Skills · 2 declared

Find backflow testers

Answer a plain-text question with the published backflow testers that match its place, category or words: the number of matches and up to 5 of them with their p…

No taxonomy category yet
directorybackflow testerssearch
About Backflow Testers

Say what Backflow Testers covers: how many backflow testers it lists and which categories it has.

No taxonomy category yet
directorybackflow testersoverview

Health · last 1 probes

Probe log
When HTTP Live JSON-RPC Latency
2026-11-11 09:36:27 200 ✓ 407ms

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Embed a badge

Updates itself and links back here.

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

Audit evidence

JSON for vendor reviews. Signed copy verifies against our JWKS.

audit.json audit.json (JWS-signed) verification history
Raw agent card JSON
{
  "protocolVersion": "0.3.0",
  "name": "Backflow Testers",
  "description": "Find a backflow tester for your property. Ask a question in plain text and get the matching backflow testers, each with its page URL. For tool access, use the MCP server at https://backflowtesters.fyi/mcp.",
  "url": "https://backflowtesters.fyi/a2a",
  "preferredTransport": "JSONRPC",
  "additionalInterfaces": [
    {
      "url": "https://backflowtesters.fyi/a2a",
      "transport": "JSONRPC"
    }
  ],
  "version": "1",
  "documentationUrl": "https://backflowtesters.fyi/developers",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false
  },
  "defaultInputModes": [
    "text/plain"
  ],
  "defaultOutputModes": [
    "text/plain",
    "application/json"
  ],
  "skills": [
    {
      "id": "find-listings",
      "name": "Find backflow testers",
      "description": "Answer a plain-text question with the published backflow testers that match its place, category or words: the number of matches and up to 5 of them with their page URL.",
      "tags": [
        "directory",
        "backflow testers",
        "search"
      ],
      "examples": [
        "List backflow testers in the Backflow testing category"
      ],
      "inputModes": [
        "text/plain"
      ],
      "outputModes": [
        "text/plain",
        "application/json"
      ]
    },
    {
      "id": "describe-directory",
      "name": "About Backflow Testers",
      "description": "Say what Backflow Testers covers: how many backflow testers it lists and which categories it has.",
      "tags": [
        "directory",
        "backflow testers",
        "overview"
      ],
      "examples": [
        "What can you tell me about backflow testers?"
      ],
      "inputModes": [
        "text/plain"
      ],
      "outputModes": [
        "text/plain",
        "application/json"
      ]
    }
  ]
}