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A2A A2A 0.3 v1.0.0

Docs by LangChain

langchain-5e9cc07a.main-kill-isr.mintlify.me · Docs by LangChain

Documentation for LangSmith, Fleet, and our open source packages.

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Verify the domain langchain-5e9cc07a.main-kill-isr.mintlify.me 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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Compare public evidence

🔔 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%

35 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

35/35 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: Docs by LangChain (https://docs.langchain.com/). 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

10 snapshots drifted 9× Every change to agent-card.json

Captured	Hash
2026-10-10 08:20:13 current	`9d0a4b56fc0c…`	view →
2026-10-08 15:50:45	`08907a53b306…`	view →
2026-10-07 17:28:01	`4feaab7435c7…`	view →
2026-10-06 09:05:03	`08907a53b306…`	view →
2026-10-05 09:31:54	`0dc5a240753d…`	view →
2026-10-04 06:25:48	`fcff39fd462f…`	view →
2026-10-03 10:56:05	`92fee12f2b21…`	view →
2026-10-02 09:31:41	`cc24842c984e…`	view →
2026-10-02 03:28:50	`9e74c11159c1…`	view →
2026-09-30 19:52:20	`dbd5fd2d863a…`	view →

Showing latest 10. Older snapshots available via GET /api/agents/langchain-5e9cc07a.main-kill-isr.mintlify.me/snapshots.

Uptime

100.0%

35 direct probes · 30d

Response

792ms

last direct probe

Skills

declared

Streaming

—

SSE-capable

Endpoints

Agent card	`https://langchain-5e9cc07a.main-kill-isr.mintlify.me/.well-known/agent-card.json`
Provider	https://docs.langchain.com/
Docs	https://docs.langchain.com/

About this provider off-card enrichment

SSL certificate

Let's Encrypt

expires 2026-10-03

Discovered via

manifests recrawl_hot recrawl_warm

Skills · 1 declared · mapped to canonical taxonomy

langchain

Use when building, testing, deploying, and monitoring LLM agents.

orphan: no canonical match yet

Health · last 30 probes

When	HTTP	Live JSON-RPC	Latency
2026-10-11 11:50:50	200	—	792ms
2026-10-10 22:10:50	200	—	777ms
2026-10-10 08:20:13	200	—	2886ms
2026-10-09 14:20:37	200	—	811ms
2026-10-09 03:30:41	200	—	839ms
2026-10-08 15:50:45	200	—	832ms
2026-10-08 05:24:08	200	—	911ms
2026-10-07 17:28:01	200	—	697ms
2026-10-07 05:33:40	200	—	1840ms
2026-10-06 17:19:45	200	—	798ms

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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/langchain-5e9cc07a.main-kill-isr.mintlify.me.svg)](https://agenstry.com/agents/langchain-5e9cc07a.main-kill-isr.mintlify.me)
[![Verified Business](https://agenstry.com/badge/langchain-5e9cc07a.main-kill-isr.mintlify.me/identity.svg)](https://agenstry.com/agents/langchain-5e9cc07a.main-kill-isr.mintlify.me)
[![Uptime](https://agenstry.com/badge/langchain-5e9cc07a.main-kill-isr.mintlify.me/uptime.svg)](https://agenstry.com/agents/langchain-5e9cc07a.main-kill-isr.mintlify.me)
[![A2A version](https://agenstry.com/badge/langchain-5e9cc07a.main-kill-isr.mintlify.me/protocol.svg)](https://agenstry.com/agents/langchain-5e9cc07a.main-kill-isr.mintlify.me)

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": "Docs by LangChain",
  "description": "Documentation for LangSmith, Fleet, and our open source packages.",
  "url": "https://docs.langchain.com/",
  "version": "1.0.0",
  "protocolVersion": "0.3",
  "preferredTransport": "HTTP+JSON",
  "supportedInterfaces": [
    {
      "url": "https://docs.langchain.com/",
      "protocolBinding": "HTTP+JSON",
      "protocolVersion": "0.3"
    }
  ],
  "provider": {
    "url": "https://docs.langchain.com/",
    "organization": "Docs by LangChain"
  },
  "documentationUrl": "https://docs.langchain.com/",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false
  },
  "defaultInputModes": [
    "text/plain"
  ],
  "defaultOutputModes": [
    "text/plain"
  ],
  "skills": [
    {
      "id": "langchain",
      "name": "langchain",
      "description": "Use when building, testing, deploying, and monitoring LLM agents.",
      "tags": [],
      "url": "https://docs.langchain.com/.well-known/agent-skills/langchain/skill.md"
    }
  ]
}

Activity (audit trail)

Card history

Endpoints

Skills · 1 declared · mapped to canonical taxonomy

Health · last 30 probes

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