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aniruddhaadak80

hooklens

by aniruddhaadak80
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TypeScript
Remote

$ hooklens_

Catch, inspect & debug webhooks in real time — a bin URL that records every request, a terminal UI that explains every payload, and MCP tools so your AI agent debugs webhooks itself.

Live Demo License: MIT Next.js Neon Postgres MCP

Live App · Bins · Docs · MCP · Issues

✨ Features

  • 📥 Bin URLs that catch anything — POST /api/hook/:id accepts GET/POST/PUT/PATCH/DELETE, stores headers + query + body (256 KB cap), answers in ms

  • 🔍 Deterministic inspector — JSON/form/XML detection, signature-header spotting, malformed-body + missing-signature warnings, one-click replay curl, JSON export

  • 🔗 Hash-sealed captures — SHA-384(prevSeal ‖ canonicalJson) chained per bin, seal ok / BROKEN shown inline, re-verifiable offline

  • 🤖 MCP tools that mutate — create_bin, list_bins, get_requests, inspect_request, clear_bin + live in-page console

  • 🖥️ Terminal identity — phosphor green, scanlines, blinking cursor, live polling stream; zero globes were harmed

  • 🗄️ Real Postgres (Neon) — bins and captures survive redeploys; full CRUD through UI, REST, and agents

Related MCP server: Atlas MCP Server

🏗️ System architecture

flowchart LR
    S[senders: Stripe GitHub Twilio] --> H["/api/hook/:id"]
    H --> P[(Neon Postgres)]
    P --> UI["/bins/:id live stream"]
    P --> R["REST: bins + requests + export"]
    P --> M["/api/mcp 5 tools"]
    I["inspectRequest()"] --> UI
    I --> R
    I --> M
    classDef live fill:#22d3ee,color:#04060c
    classDef engine fill:#a78bfa,color:#04060c
    classDef agent fill:#34d399,color:#04060c
    classDef ext fill:#fbbf24,color:#04060c
    class S ext
    class H,P,UI,R live
    class I engine
    class M agent

🌊 Capture pipeline

flowchart TB
    R[HTTP hit any method] --> B{bin exists?}
    B -->|no| N[404]
    B -->|yes| C[cap headers + query + body]
    C --> S["seal = SHA-384(prev + json)"]
    S --> W[insert + bump count]
    W --> J["200 {ok, id, seal}"]
    classDef live fill:#22d3ee,color:#04060c
    classDef caution fill:#fbbf24,color:#04060c
    classDef risk fill:#fb7185,color:#04060c
    class R,C,S,W,J live
    class B caution
    class N risk

🧮 Inspector flow

flowchart LR
    C[content-type] --> K{body kind?}
    K --> J[json: parse + keys]
    K --> F[form: fields]
    K --> X[xml / text / empty]
    J --> G[signature? size? sender?]
    F --> G
    X --> G
    G --> V[replay seal chain]
    V --> O[findings + seal ok?]
    classDef engine fill:#a78bfa,color:#04060c
    classDef live fill:#22d3ee,color:#04060c
    classDef agent fill:#34d399,color:#04060c
    class C,K live
    class J,F,X,G engine
    class V,O agent

🤖 Agent (MCP) sequence

sequenceDiagram
    participant A as Agent
    participant M as /api/mcp
    participant D as Neon
    A->>M: tools/call create_bin
    M->>D: INSERT bin
    D-->>M: bin id
    M-->>A: hook_path
    A->>M: tools/call get_requests
    M->>D: SELECT captures
    M-->>A: requests JSON
    A->>M: tools/call inspect_request
    M-->>A: findings + sealValid

🔗 Seal chain

flowchart TB
    R["record: id method headers query body size"] --> J[canonicalJson sorted keys]
    J --> H["SHA-384 prevSeal + json"]
    H --> S[stored seal]
    S --> V{inspector replay?}
    V -->|match| OK[seal ok]
    V -->|mismatch| BAD[seal BROKEN]
    classDef engine fill:#a78bfa,color:#04060c
    classDef agent fill:#34d399,color:#04060c
    classDef risk fill:#fb7185,color:#04060c
    class R,J,H engine
    class S,V,OK agent
    class BAD risk

🚀 Deployment pipeline

flowchart LR
    P[push to main] --> CI[Actions: lint + build]
    CI --> V[vercel --prod]
    V --> E[DATABASE_URL env]
    E --> H["/api/health 200"]
    H --> M[mutation proof: create bin + hook + read back]
    M --> L[live alias verified]
    classDef infra fill:#94a3b8,color:#04060c
    classDef live fill:#22d3ee,color:#04060c
    classDef agent fill:#34d399,color:#04060c
    class P,CI,V,E infra
    class H live
    class M,L agent

🧭 User-journey flow

flowchart TB
    L[land: create bin or fire demo] --> B[open bin: copy endpoint]
    B --> S[POST a webhook from anywhere]
    S --> W[watch it stream in live]
    W --> I[inspect + replay curl + export]
    I --> A[agent does it all via MCP]
    classDef live fill:#22d3ee,color:#04060c
    classDef engine fill:#a78bfa,color:#04060c
    classDef agent fill:#34d399,color:#04060c
    class L,B,S,W live
    class I engine
    class A agent

🚀 Quickstart

git clone https://github.com/aniruddhaadak80/hooklens.git
cd hooklens
npm install

Needs one env var — a Postgres URL (free at neon.tech, then run the 3 CREATE TABLE statements from src/lib schema via the Neon SQL editor):

# .env.local
DATABASE_URL=postgresql://user:pass@host/db?sslmode=require
npm run dev   # open http://localhost:3000

Prod: vercel env add DATABASE_URL production (and CI secret DATABASE_URL).

🔌 API

BASE=https://hooklens-brown.vercel.app
curl -X POST $BASE/api/bins -H 'content-type: application/json' -d '{"name":"stripe"}'
# → {"bin":{"id":"bin_k7q2m9xd", ...}} — grab the id
curl -X POST $BASE/api/hook/bin_k7q2m9xd -H 'content-type: application/json' -d '{"type":"order.paid"}'
curl $BASE/api/bins/bin_k7q2m9xd/requests?limit=5   # read back the capture ↑
curl $BASE/api/bins/bin_k7q2m9xd/requests/req_xyz   # inspection + seal check
curl -O $BASE/api/bins/bin_k7q2m9xd/export          # download JSON
curl -X POST $BASE/api/mcp -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"create_bin","arguments":{"name":"agent"}}}}'

Agent setup (mcp.json block — full manifest in public/mcp.json):

{
  "mcpServers": {
    "hooklens": { "url": "https://hooklens-brown.vercel.app/api/mcp", "transport": "json-rpc" }
  }
}

📁 Project map

Path

What

src/app/page.tsx

/ landing: create bin, fire demo, stats

src/app/bins/page.tsx

/bins dashboard: list, create, delete

src/app/bins/[id]/page.tsx

/bins/:id inspector: endpoint, curl, live stream, export, clear

src/app/docs/page.tsx

/docs REST + MCP docs + live console

src/app/api/hook/[id]/route.ts

Public catcher: any method → sealed capture

src/app/api/bins*/route.ts

CRUD bins, requests, export

src/app/api/mcp/route.ts

JSON-RPC: 5 tools incl. mutations

src/lib/db.ts / inspect.ts / seal.ts

Neon access, deterministic inspector, hash chain

🗺️ Roadmap

  • Now — catch + inspect + automate (wow outcome = curl once, watch it stream in, replay it)

  • Next — saved replays & alerts (wow outcome = re-fire any capture on a schedule, get notified on match)

  • Later — request diffing (wow outcome = diff two captures side-by-side to spot breaking webhook changes)

flowchart LR
    C[capture] --> F[filters + search]
    F --> A[alerts on match]
    classDef live fill:#22d3ee,color:#04060c
    classDef engine fill:#a78bfa,color:#04060c
    class A engine
    class C,F live
flowchart TB
    R[saved replay] --> S[schedule]
    S --> N[notify on diff]
    classDef agent fill:#34d399,color:#04060c
    classDef engine fill:#a78bfa,color:#04060c
    class R engine
    class S,N agent
flowchart LR
    A[capture A] --> D[side-by-side diff]
    B[capture B] --> D
    classDef risk fill:#fb7185,color:#04060c
    classDef live fill:#22d3ee,color:#04060c
    class A,B live
    class D risk

🤝 Contributing

See CONTRIBUTING.md. MIT licensed — see LICENSE. Security notes in SECURITY.md.

⚠️ Debugging tool: bins are unlisted but unprotected — never POST real secrets, cards, or PII.

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

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