Appointment Booking

Agent Broker - SMB Transaction & Communication MCP Server

An agent-callable MCP server that lets autonomous AI agents find, verify, message, schedule with, and transact with small and mid-sized businesses (SMBs) through a single compliance-enforced tool surface.

Live endpoint: https://hatchloop.dev/mcp/agent-broker (streamable-http, always-on Cloudflare edge)

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Why this exists

There are ~60 million long-tail small businesses in the US - barbers, plumbers, accountants, home cleaners - and they have no API surface. AI agents that need to schedule a haircut, get a quote, or send a confirmation today must either drive a browser, cold-call by voice, or give up.

This server is the missing middle layer. Agents call us; we route to the right SMB through whichever channel reaches them fastest - Cal.com -> WhatsApp -> SMS -> voice AI -> email - with full TCPA / GDPR / CASL / 10DLC compliance enforced as a non-bypassable gate.

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Current status (honest)

Capability	Status
MCP endpoint (streamable-http)	Live - https://hatchloop.dev/mcp/agent-broker
22 MCP tools	Live (callable today)
Compliance gate (TCPA/GDPR/CASL)	Live
REST + A2A + OpenAI/Anthropic tool surfaces	Live
SMB supply network	Demo - 20+ seed SMBs; demo bookings return demo_smb_no_live_booking
Billing	Live - 11 utility tools free (no key, unmetered). Premium data tools (company verification, sanctions, trade screening): free up to a daily limit (500/day with a free key, 100/day anonymous), then $0.02/call via credits. Write tools: free email-verified key (100 ops/day) at hatchloop.dev/agent-broker; credit packages from $9/1,000 credits at hatchloop.dev/pricing;.
x402 payment rail	Offered, opt-in. Enabled on the service since the founder lifted the crypto restriction on 2026-08-29. A caller attaches a payment in params._meta["x402/payment"] and the call is served without a key (USDC on Base, proven once on mainnet, tx 0x38a0d9ec). Callers who do not attach one fall through to credits and the free quota, so nothing is gated behind it. /.well-known/x402 is still a 404 - discovery is via /.well-known/mcp.json, which lists the rail.
Production SMB onboarding	Planned - real businesses not yet enrolled

The MCP server is live and callable right now. Bookings hit demo data. 11 utility tools are free (no key, unmetered). Premium data tools (verify_company_record, screen_sanctions, map_trade_restriction) are free up to a daily limit; beyond that, $0.02/call via credits. Write tools require a free email-verified key (100 ops/day) - get one at https://hatchloop.dev/agent-broker. Credit packages from $9/1,000 credits at https://hatchloop.dev/pricing.

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22 MCP Tools

All tools are callable via MCP, REST, OpenAI function calling, Anthropic tool_use, or A2A protocol.

#	Tool	What it does	Auth
1	find_business	Search SMBs by vertical, location, and capability	free
2	verify_business	Confirm an SMB is real, operating, and capable of the requested service	free
3	get_status	Poll the current state of an async operation	free
4	get_outcome	Retrieve the final OutcomeReceipt (with cost and reason codes)	free
5	preview_cost	Estimate cost, latency, and success probability before committing	free
6	self_test	Verify service health and all claimed capabilities are responding	free
7	check_booking_link	Classify a URL and confirm import_booking_url will accept it - sub-100ms pre-flight	free
8	check_compliance	Preview TCPA/GDPR/CASL/10DLC gate result before spending a paid send	free
9	verify_company_record	Live GLEIF LEI registry + SEC EDGAR lookup - official legal name, status, jurisdiction, address	free up to daily limit
10	screen_sanctions	Check a name or entity against OFAC SDN, the EU Consolidated list and the UK Sanctions List	free up to daily limit
11	map_trade_restriction	OFAC country embargoes + export-control Entity List + sanctioned-party screening for a proposed shipment	free up to daily limit
12	get_conversation	Read a two-way thread you started: state, full transcript, reply count	free
13	lookup_us_contracts	Search US federal contract awards by company name via USASpending.gov - awardee, agency, amount, NAICS, period	free
14	send_message	Send WhatsApp, SMS, email, or voice with compliance pre-check enforced	key
15	capture_lead	Structured intake of a prospect into an SMB pipeline with CRM integration	key
16	schedule_appointment	Book, reschedule, or cancel - tries direct booking API, falls back to voice AI	key
17	send_transactional_confirmation	TCPA-exempt OTPs, booking confirmations, receipts	key
18	handle_inbound	Classify inbound messages: booking / cancel / opt-out / question / complaint	key
19	escalate_to_human	Hand off a stuck or ambiguous task to a human operator with full context	key
20	import_booking_url	Turn any Cal.com, Calendly, Doctolib, Booksy, OpenTable, Square, Acuity, or Fresha URL into a bookable SMB record	key
21	call_business	Place a conversational voice-AI phone call to a business on behalf of a consumer	key
22	mint_key	Issue a free-tier agent identity key via HMAC proof - no email required, no human in the loop	free

Free key (100 write ops/day + 500 premium data calls/day): https://hatchloop.dev/agent-broker - Credits from $9/1,000 ops: https://hatchloop.dev/pricing - Premium data beyond quota: $0.02/call

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Quick start

Connect via MCP (Claude Desktop, Cursor, Cline, Continue, etc.)

{
  "mcpServers": {
    "agent-broker": {
      "url": "https://hatchloop.dev/mcp/agent-broker"
    }
  }
}

12 tools require no key (find_business, verify_business, verify_company_record, screen_sanctions, map_trade_restriction, check_booking_link, check_compliance, get_conversation, get_status, get_outcome, preview_cost, self_test).

Write tools require an X-Agent-Identity bearer token:

• Free email-verified key (100 ops/day): https://hatchloop.dev/agent-broker
• Machine-mintable key (no email, agent self-serve): POST https://api.hatchloop.dev/keys/mint - see Machine-mintable keys below.
• Credits from $9/1,000 ops: https://hatchloop.dev/pricing

Add your key to the config once you have one:

{
  "mcpServers": {
    "agent-broker": {
      "url": "https://hatchloop.dev/mcp/agent-broker",
      "headers": {
        "X-Agent-Identity": "Bearer YOUR_KEY_HERE"
      }
    }
  }
}

Or via npx (stdio transport)

npx agentbroker-mcp

With a key:

AGENT_BROKER_KEY=your_key npx agentbroker-mcp

Discover tools (JSON-RPC)

curl -X POST https://hatchloop.dev/mcp/agent-broker \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}'

Call a tool (JSON-RPC)

curl -X POST https://hatchloop.dev/mcp/agent-broker \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 2,
    "method": "tools/call",
    "params": {
      "name": "find_business",
      "arguments": {
        "vertical": "personal_services",
        "location": {"zip_or_city": "30309"},
        "capability": "haircut"
      }
    }
  }'

OpenAI function calling

import httpx, openai
tools = httpx.get(
    "https://hatchloop.dev/.well-known/openai-tools.json"
).json()["tools"]
client = openai.OpenAI()
resp = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Book a haircut in Atlanta Saturday under $50"}],
    tools=tools,
)

Anthropic tool use

import httpx, anthropic
tools = httpx.get(
    "https://hatchloop.dev/.well-known/anthropic-tools.json"
).json()["tools"]
client = anthropic.Anthropic()
msg = client.messages.create(
    model="claude-opus-4-5",
    max_tokens=1024,
    tools=tools,
    messages=[{"role": "user", "content": "Book a haircut in Atlanta Saturday under $50"}],
)

Plain REST

curl -X POST https://hatchloop.dev/ops/find_business \
  -H "Content-Type: application/json" \
  -d '{"vertical":"personal_services","location":{"zip_or_city":"30309"},"capability":"haircut"}'

---

Machine-mintable keys

AI agents that cannot receive email can self-provision a free-tier API key (100 gated ops/day) by proving identity via HMAC-SHA256.

How it works

1. Obtain the MACHINE_MINT_SECRET from hatchloop.dev/docs/#machine-mint.
2. Compute the signature:

   signature = HMAC-SHA256(agent_id + str(timestamp) + nonce, MACHINE_MINT_SECRET)
   

   The HMAC input is the raw concatenation of the three fields (no separators). Digest must be lowercase hex.
3. POST to https://api.hatchloop.dev/keys/mint:

{
  "agent_id": "my-agent-abc123",
  "timestamp": 1725100000,
  "nonce": "4f8a2c1d9e2b7c6a",
  "signature": "<lowercase-hex-hmac>"
}

Response

{
  "ok": true,
  "key": "<JWT - use as X-Agent-Identity header>",
  "key_id": "free_machine_<hash>",
  "expires_at": "2026-11-28",
  "tier": "free",
  "daily_limit": 100,
  "usage": "Send as the X-Agent-Identity header on every call to https://hatchloop.dev/mcp/agent-broker"
}

Constraints

• timestamp must be within 60 seconds of server time (prevents replay attacks).
• Use a fresh nonce on every call (UUID or random hex).
• agent_id is a stable identifier for your agent; the issued key is tied to its SHA-256 hash.
• Returns 401 {error: "invalid_request"} on bad signature or stale timestamp.
• Returns 503 {error: "not_configured"} if the server secret has not been set (contact hello@hatchloop.dev).

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Discovery surfaces

Surface	URL
MCP (streamable-http)	https://hatchloop.dev/mcp/agent-broker
MCP descriptor	https://hatchloop.dev/.well-known/mcp.json
OpenAI function tools	https://hatchloop.dev/.well-known/openai-tools.json
Anthropic tool_use	https://hatchloop.dev/.well-known/anthropic-tools.json
A2A (Agent-to-Agent)	https://hatchloop.dev/.well-known/agents.json
OpenAI ChatGPT plugin	https://hatchloop.dev/.well-known/ai-plugin.json
llms.txt	https://hatchloop.dev/llms.txt
OpenAPI 3.1	https://hatchloop.dev/openapi.yaml
npm shim (stdio)	npx agentbroker-mcp
Glama MCP Registry	Listed via glama.json
MCP Registry	Listed via server.json

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Architecture

AI agent
   |
   v  MCP / REST / A2A
Cloudflare Worker edge  (hatchloop.dev)
   |  300+ PoPs globally -- discovery served from edge bundle in 40-70 ms
   |
   +-- GET /.well-known/* /manifest /llms.txt  --> embedded snapshot (40-70 ms)
   +-- POST /mcp  initialize / tools/list      --> embedded snapshot (40-65 ms)
   +-- POST /mcp  tools/call  /ops/*           --> proxy to origin  (170-190 ms)
                |
                v
        Python FastAPI  (api.hatchloop.dev)
                |  Cron keep-alive every 2 min (eliminates Render cold starts)
                |
                +-- 22 operation handlers  (core/)
                +-- Compliance gate        (compliance/pre_check)
                +-- Channel adapters       (channels/ -- Twilio, Cal.com, Vapi, SendGrid)
                +-- Billing + outcome store
                +-- All .well-known / MCP endpoints (also served from edge bundle)

The edge worker can outlive the origin: discovery still works even if the origin is down. Idempotency is keyed by (agent_id, operation, idempotency_key) with 24h TTL. Async operations return pending_async; poll with get_status / get_outcome.

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Compliance

Every outbound communication passes through compliance/pre_check():

1. Content classification - blocks restricted categories (gambling, adult, cannabis, spam)
2. Opt-out check - TCPA STOP keyword, GDPR right-to-be-forgotten, CASL
3. Consent check - TCPA written consent, GDPR opt-in, CASL implied/express
4. 10DLC registry check - US SMS campaign compliance
5. Two-party recording consent - CA, FL, IL, MD, MA, MT, NV, NH, PA, WA
6. Audit log - PII stored as SHA-256 hash, never plaintext

Violations surface as ComplianceViolationError and are never silently bypassed.

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Repo layout

agentbroker/
+-- core/                  # 22 operation handlers + shared Pydantic models
+-- channels/              # Twilio, SendGrid, Vapi, Bland, Cal.com, Playwright
+-- compliance/            # pre_check, jurisdiction_rules, consent_store, audit_log
+-- reliability/           # retry, circuit_breaker, channel_fallback, async_runner
+-- billing/               # meter, budget_guard, receipt_signer, pricing_tiers
+-- telemetry/             # tracer, log_redactor, metrics_emitter
+-- storage/               # outcome_store, idempotency_store
+-- supply/                # smb_directory (20+ seed/demo SMBs)
+-- onboarding/            # self_serve, verification_flow, channel_capture
+-- feedback/              # failure_classifier, attribution_engine, outcome_evaluator
+-- optimizer/             # ab_router, selection_analytics, weekly_report
+-- agent_interface/       # manifest_server, mcp_server, well_known, identity, webhooks
+-- manifest/              # manifest.json, mcp_tools.json, openapi.yaml
+-- api/                   # errors.md, identity.md, async.md
+-- docs/                  # mission, architecture, compliance, ADRs
+-- edge/                  # Cloudflare Worker (TypeScript/Hono)
+-- deploy/                # Dockerfile, docker-compose.yml
+-- tests/                 # unit, contract, compliance, fault_injection, agent_sim
+-- main.py                # FastAPI entry point
+-- config.py              # Centralized config from env
+-- requirements.txt

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Local development

# Install dependencies
pip install -r requirements.txt

# Run tests (1173 passing at the time of writing)
python -m pytest tests/ -q

# Start the API
python main.py
# --> http://localhost:8000/docs      (Swagger UI)
# --> http://localhost:8000/mcp       (MCP endpoint)
# --> http://localhost:8000/manifest  (capability manifest)

# Run the agent simulation harness
python -m tests.agent_sim.harness

# Self-test
python -c "import asyncio; from agent_interface.self_test import run_self_test; print(asyncio.run(run_self_test()).all_passed)"

Or with Docker:

docker compose -f deploy/docker-compose.yml up

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Documentation

• Architecture - module map, data flow, fallback chains
• Compliance - full jurisdiction matrix, pre-check sequence
• Agent integration guide - copy-paste examples for every protocol
• API errors - 16 error codes with retry semantics
• API identity - Agent-Identity JWT spec
• API async - execution profiles, polling rules, webhook contract
• Benchmarks - measured WinRate, latency, cost vs alternatives
• Mission - north-star metric and scope

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Contributing

Licensed under MIT. Issues and discussion are welcome - open a GitHub issue to report bugs or suggest features. For substantial changes, please open an issue first to discuss direction. Note: this repo is the open-source server; the hosted service at hatchloop.dev (supply index, billing rails) is operated by Hatchloop.

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License

MIT - see LICENSE. The hosted service and its supply/billing data are operated separately by Hatchloop.

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Built by Basil Al-Shukaili. Listed on the MCP Registry and Glama.