AgentTax

Tax compliance for MCP tool developers and AI agents, powered byAgentTax.

{ "mcpServers": { "agenttax": { "command": "npx", "args": ["@agenttax/mcp-server"], "env": { "AGENTTAX_API_KEY": "atx_live_your_key" } } } }

track_payment({ amount: 49.00, buyer_state: "TX", buyer_zip: "78701", description: "MCP API access — monthly subscription", payment_id: "pi_stripe_abc123", source: "stripe" })

Returns your tax liability, compliance status, and logs it to your account. All transactions are viewable in yourAgentTax dashboard.

For fully automatic tax tracking without calling any tool manually, point your Stripe webhook to AgentTax:
- InStripe Dashboard → Developers → Webhooks, add an endpoint:

https://agenttax.io/api/v1/webhooks/stripe?key=atx_live_YOUR_KEY

claude mcp add agenttax -- npx @agenttax/mcp-server export AGENTTAX_API_KEY=atx_live_your_key

{ "mcpServers": { "agenttax": { "command": "npx", "args": ["@agenttax/mcp-server"], "env": { "AGENTTAX_API_KEY": "atx_live_your_key" } } } }

Demo mode works without a key (50 calls/day, no account required).

Track a payment you received and calculate your sales tax liability. The primary tool for MCP tool developers.

track_payment({ amount: 49.00, buyer_state: "TX", buyer_zip: "78701", description: "MCP tool subscription", payment_id: "pi_stripe_abc123", source: "stripe" })

{ "payment_tracked": true, "amount": 49.00, "buyer_state": "TX", "tax_owed": 4.04, "tax_rate": 0.0825, "taxable": true, "work_type": "content", "transaction_id": "atx_...", "compliance_note": "$4.04 sales tax owed to TX. Remit to the state DOR." }

Transaction classification is automatic. Setdescriptionto what you sold for best results, or pass an explicitwork_typevia the Stripe metadata field.

Full tax calculation with complete audit trail. Use this when you need jurisdiction details, confidence scoring, and advisories.

calculate_tax({ role: "seller", amount: 500, buyer_state: "TX", buyer_zip: "78701", transaction_type: "saas", work_type: "content", counterparty_id: "customer-abc", is_b2b: false })

Log a buy or sell for capital gains tracking.

log_trade({ asset_symbol: "COMPUTE", trade_type: "buy", quantity: 100, price_per_unit: 12.50 })

Sell trades return realized gain/loss with cost basis (FIFO, LIFO, or Specific ID).

Get tax rates for all 51 US jurisdictions or a single state.

get_rates({ state: "TX", explain: true })

Set which states you have economic nexus in. Required for sellers to get non-zero tax results.

configure_nexus({ nexus: { TX: { hasNexus: true, reason: "Economic nexus" }, NY: { hasNexus: true, reason: "Physical presence" } } })

Check API health and available endpoints.

curl -X POST https://agenttax.io/api/v1/auth/signup \ -H "Content-Type: application/json" \ -d '{"email": "you@example.com", "password": "securepass", "agent_name": "my-mcp-server"}'

Save theapi_key.keyfrom the response — it's only shown once.

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