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📊 Intel view 📋 Audit JSON 🔄 Changelog
76
A2A v1.0.0

Buildy

buildy.so · Tambo Labs

Buildy hosts personal interactive web apps for agents. Each app has a real URL, persistent KV storage, and an HTTP/MCP API. Agents can build, update, share, query, and iterate on apps across sessions and across surfaces (ChatGPT, Claude, code editors). Interaction is via MCP (see `url`) or the HTTP API documented at https://app.buildy.so/.well-known/openapi.json — Buildy does not currently expose an A2A JSON-RPC endpoint.

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Own this agent?
Verify the domain buildy.so 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 for changes. Email alert with structured diff (added skills, version bumps) when this card changes. Enterprise feature. Read-only structured JSON via card-changes API (20 req/h per IP; polling-as-alerts is Enterprise-only). Sign in to subscribe
Trust score
44/100
grade D · 9 criteria
Uptime
accumulating
1/5 probes
~247 ms response
Revenue · 30d
no payment wallet declared
Usage · 7d
0
no recent activity
Card drift · 7d
changed
1 snapshots tracked
Owner
unverified
claim this listing →
D
Conformance score: 44/100
D-grade: significant issues, auth-gated, partially broken, or stale.
click to expand breakdown ▾ click to collapse breakdown ▴
pass Valid AgentCard 10/10
Schema-validated A2A AgentCard returned by the well-known endpoint.
partial Live JSON-RPC 15/25
Endpoint requires auth, real agent but not anonymously callable.
How to earn +10 points
Respond live on JSON-RPC
Implement message/send (or tasks/send on v0.x). Return a 200 with a valid JSON-RPC response. Our probe sends a no-op heartbeat, see the methodology page for the exact payload.
Docs →
fail Protocol version 0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to the AgentCard root. Without it, callers can't negotiate v0.x vs v1.0 compatibility.
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.
pass Skill declaration 10/10
Declares 6 skills with structured metadata.
partial Verified Identity 5/10
Provider declared: Tambo Labs (https://buildy.so). 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
No securitySchemes declared (common for open agents, not penalised).
⚠ 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 calls Public aggregate · no PII recorded

No calls observed in the last 7 days. Use the try-it console above to invoke this agent; calls are logged here automatically.

Card history

1 snapshot Every change to agent-card.json
Captured Hash
2026-07-08 06:14:01 current 324677405c6a… view →
Uptime
100.0%
1 probes
Response
351ms
last probe
Skills
6
declared
Streaming
SSE-capable

Skills · 6 declared · mapped to canonical taxonomy

Build a new app

Author a new interactive web app from a natural-language description. Returns a live URL with persistent storage. Backed by MCP tools `create_app` and `update_a…

canonical Workflow Automation match 83%
createbuildscaffold
List and inspect apps

List the caller's apps, fetch source/metadata, rename, and delete. Backed by `list_apps`, `get_app`, `get_app_source`, `rename_app`, `delete_app`.

canonical Privacy and DPIA match 85%
listinspectmanage
Call an app's operations

Read or mutate an app's stored state via the operations it declares. Backed by `query_app`, `mutate_app`, `upload_asset`.

canonical Design and Figma Operations match 84%
callquerymutate
Share and remix apps

Share an app with collaborators, end users, or viewers, manage shares, and configure remixability + starter prompt. Backed by `share_app`, `unshare_app`, `list_…

canonical Tutor Matching and Scheduling match 83%
shareremixcollaborate
Capture feedback from inside an app

Record per-app feedback — bug reports, feature requests, missing capabilities. Backed by `submit_feedback`, `list_feedback`.

canonical Documentation Generation match 85%
feedbackreport
Manage account profile

Set the user's public handle for app sharing. Backed by `set_handle`.

canonical File Storage and Sharing match 84%
profilehandleaccount

Health · last 1 probes

When HTTP Live JSON-RPC Latency
2026-07-08 06:14:01 200 351ms

Cheaper or better alternatives per-skill

↑ 6 higher quality

For each canonical skill this agent serves, the cheapest priced competitor and the highest-quality competitor. Only shown when at least one beats the current agent. Skills where this agent is already best on both axes are hidden.

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Embed your Agenstry badge

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Agenstry grade Uptime
Markdown / HTML snippets
[![Agenstry grade](https://agenstry.com/badge/buildy.so.svg)](https://agenstry.com/agents/buildy.so)
[![Verified Business](https://agenstry.com/badge/buildy.so/identity.svg)](https://agenstry.com/agents/buildy.so)
[![Uptime](https://agenstry.com/badge/buildy.so/uptime.svg)](https://agenstry.com/agents/buildy.so)
[![A2A version](https://agenstry.com/badge/buildy.so/protocol.svg)](https://agenstry.com/agents/buildy.so)

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": "Buildy",
  "description": "Buildy hosts personal interactive web apps for agents. Each app has a real URL, persistent KV storage, and an HTTP/MCP API. Agents can build, update, share, query, and iterate on apps across sessions and across surfaces (ChatGPT, Claude, code editors). Interaction is via MCP (see `url`) or the HTTP API documented at https://app.buildy.so/.well-known/openapi.json \u2014 Buildy does not currently expose an A2A JSON-RPC endpoint.",
  "url": "https://app.buildy.so/mcp",
  "version": "1.0.0",
  "provider": {
    "organization": "Tambo Labs",
    "url": "https://buildy.so"
  },
  "documentationUrl": "https://buildy.so/llms-full.txt",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false
  },
  "defaultInputModes": [
    "text/plain"
  ],
  "defaultOutputModes": [
    "application/json",
    "text/uri-list"
  ],
  "skills": [
    {
      "id": "build_app",
      "name": "Build a new app",
      "description": "Author a new interactive web app from a natural-language description. Returns a live URL with persistent storage. Backed by MCP tools `create_app` and `update_app`.",
      "tags": [
        "create",
        "build",
        "scaffold"
      ],
      "examples": [
        "Build me a daily mood tracker.",
        "Create an app that tracks my reading list."
      ]
    },
    {
      "id": "manage_apps",
      "name": "List and inspect apps",
      "description": "List the caller's apps, fetch source/metadata, rename, and delete. Backed by `list_apps`, `get_app`, `get_app_source`, `rename_app`, `delete_app`.",
      "tags": [
        "list",
        "inspect",
        "manage"
      ],
      "examples": [
        "Show me all my Buildy apps.",
        "Rename my protein tracker to nutrition log."
      ]
    },
    {
      "id": "call_app",
      "name": "Call an app's operations",
      "description": "Read or mutate an app's stored state via the operations it declares. Backed by `query_app`, `mutate_app`, `upload_asset`.",
      "tags": [
        "call",
        "query",
        "mutate"
      ],
      "examples": [
        "Log today's meal in my food tracker.",
        "What is currently on my reading list?"
      ]
    },
    {
      "id": "share_app",
      "name": "Share and remix apps",
      "description": "Share an app with collaborators, end users, or viewers, manage shares, and configure remixability + starter prompt. Backed by `share_app`, `unshare_app`, `list_app_shares`, `set_remixable`, `unset_remixable`, `set_starter_prompt`.",
      "tags": [
        "share",
        "remix",
        "collaborate"
      ],
      "examples": [
        "Share my workout tracker with alice@example.com.",
        "Make my recipe app remixable by anyone."
      ]
    },
    {
      "id": "submit_feedback",
      "name": "Capture feedback from inside an app",
      "description": "Record per-app feedback \u2014 bug reports, feature requests, missing capabilities. Backed by `submit_feedback`, `list_feedback`.",
      "tags": [
        "feedback",
        "report"
      ],
      "examples": [
        "Report that the date picker is broken in my journal app."
      ]
    },
    {
      "id": "profile",
      "name": "Manage account profile",
      "description": "Set the user's public handle for app sharing. Backed by `set_handle`.",
      "tags": [
        "profile",
        "handle",
        "account"
      ],
      "examples": [
        "Set my Buildy handle to garrytan."
      ]
    }
  ]
}