Auto.dev

Automotive data for AI agents — via MCP tools, CLI commands, SDK methods, or direct API calls.

Detect Your Surface

Check in this order. Use the first one available:

1. MCP — Check if auto_decode is in your available tools. If yes: use auto_* tools for everything. Do NOT make raw HTTP calls. To install: npx @auto.dev/sdk mcp install (installs globally and configures Claude Code, Claude Desktop, Cursor, Windsurf, VS Code Copilot, Cline, Zed).

2. CLI — Run auto --version. If installed: authenticate once with auto login (OAuth — no API key needed), then use auto commands. To install: npm install -g @auto.dev/sdk or use npx @auto.dev/sdk <command> without installing.

3. SDK — Check if @auto.dev/sdk is in project dependencies. If yes: use typed SDK methods. See code-patterns.md for all methods. To install: npm install @auto.dev/sdk

4. Direct API — Check for AUTODEV_API_KEY env var. If not set: ask the user for it or direct them to https://auto.dev/pricing (the Free plan needs no card).

MCP Tools

If MCP tools are available, this is your only section. Use auto_docs to look up parameters and response shapes before calling an unfamiliar endpoint.

auto_docs listings      # see all listing filters
auto_docs payments      # see payment params
auto_docs vin-decode    # see VIN decode response shape

Tool	Description	Plan
auto_decode	Decode a VIN	Free
auto_listings	Search listings with filters	Free
auto_photos	Get vehicle photos	Free
auto_specs	Vehicle specifications	Growth
auto_build	OEM build data ($0.10/call)	Growth
auto_recalls	Safety recalls	Growth
auto_payments	Payment calculations	Growth
auto_apr	Interest rates	Growth
auto_tco	Total cost of ownership	Growth
auto_open_recalls	Open/unresolved recalls	Scale
auto_plate	Plate to VIN ($0.55/call)	Scale
auto_taxes	Taxes and fees	Scale
auto_docs	Search bundled API documentation	—
auto_config_set	Set a config value (e.g. raw: true)	—
auto_config_get	Get a config value or list all settings	—

API metadata is stripped from MCP tool responses by default. Use auto_config_set with key: "raw" and value: "true" to get full responses.

If MCP tools are available, skip to Important Rules below.

CLI Quick Reference

Install: npm install -g @auto.dev/sdk (or use npx @auto.dev/sdk without installing) Authenticate once: auto login

auto decode <vin>
auto photos <vin>
auto listings --make Toyota --year 2024 --price 10000-40000 --state CA
auto specs <vin>
auto build <vin>
auto recalls <vin>
auto open-recalls <vin>
auto payments <vin> --price 35000 --zip 90210 --down-payment 5000
auto apr <vin> --year 2024 --make Honda --model Accord --zip 90210 --credit-score 750
auto tco <vin> --zip 90210
auto taxes <vin> --price 35000 --zip 90210
auto plate <state> <plate>
auto usage
auto docs [query]        # search bundled docs
auto explore [endpoint]  # browse params and mappings

All commands support --json, --yaml, --raw, and --api-key <key> flags.

API metadata is stripped by default — you get clean vehicle data. Use --raw to see the full API response.

auto config set raw true    # always show full responses
auto config get raw         # check current value
auto config list            # show all settings

Full CLI reference: https://docs.auto.dev/v2/cli-mcp-sdk

If CLI is available, skip to Important Rules below.

Direct API Quick Reference

Use these only when MCP and CLI are unavailable.

V2 (base: https://api.auto.dev): Authorization: Bearer {key} or ?apiKey={key} V1 (base: https://auto.dev/api): ?apikey={key} (query string only)

Endpoint	Plan	Required Params
GET /listings?filters	Free	See v2-listings-api.md
GET /listings/{vin}	Free	—
GET /vin/{vin}	Free	—
GET /photos/{vin}	Free	—
GET /specs/{vin}	Growth	—
GET /build/{vin}	Growth	— ($0.10/call)
GET /recalls/{vin}	Growth	—
GET /tco/{vin}	Growth	—
GET /payments/{vin}	Growth	price, zip
GET /apr/{vin}	Growth	year, make, model, zip, creditScore
GET /openrecalls/{vin}	Scale	—
GET /plate/{state}/{plate}	Scale	— ($0.55/call)
GET /taxes/{vin}	Scale	—

V1 supplemental (no V2 equivalent): /api/models, /api/cities, /api/zip/{zip}, /api/autosuggest/{term}

Before making any Direct API call, read the relevant reference file for full parameter names and examples. Full parameter reference: v2-listings-api.md | v2-vin-apis.md | v2-plate-api.md | v1-apis.md

Common Gotchas (All Surfaces)

These parameter names do NOT exist on the Direct API — agents hallucinate them frequently:

make=    ← use vehicle.make
model=   ← use vehicle.model
state=   ← use retailListing.state
price=   ← use retailListing.price (on /listings), or price= (on /payments, /taxes)
rows=    ← use limit
sort=    ← no sort parameter exists
_order=  ← no sort parameter exists

MCP and CLI handle these mappings automatically. This only matters for Direct API calls.

Plans & Pricing

See pricing.md for full per-call costs and upgrade links.

Plan	Monthly	Includes
Free	$0, no card	VIN Decode, Listings, Photos (1,000 calls/mo, hard cap)
Growth	$299/mo + data fees	+ Specs, Recalls, TCO, Payments, APR, Build
Scale	$599/mo + data fees	+ Open Recalls, Plate-to-VIN, Taxes & Fees

All plans charge per-call data fees on every request. Growth/Scale have no cap on volume but data fees still apply.

Important Rules

• Before batch operations, call the endpoint once with a single item to see the actual response shape. Do not guess field names or nesting — inspect the real response first.
• Include ALL fields from the API response unless the user explicitly says to exclude some.
• Small results (<10 items, single VIN): Display inline as formatted table
• Large results (10+ listings): Ask user preference, default to CSV export
• Always support: CSV, JSON export when user requests
• Chain APIs when the query spans multiple endpoints — MCP tools and CLI commands can be called in parallel
• Sensitive inputs: creditScore, zip, and the price / trade-in / down-payment fields on /apr, /payments, and /taxes are transmitted to the Auto.dev API. Ask the user for these values rather than inferring them, send only what the endpoint requires, and don't persist or echo them beyond the answer.
• Plate lookups (/plate/{state}/{plate}) resolve a license plate to a specific vehicle and can identify its owner. Confirm the user has a legitimate purpose, and never run them in bulk against plates the user did not supply.
• When writing exports to disk, confirm the destination path first and don't overwrite an existing file without asking.

Deep Reference

MCP or CLI: use auto_docs [query] or auto docs [query] for live parameter lookup. Full reference: https://docs.auto.dev/v2/cli-mcp-sdk

SDK: see code-patterns.md for typed methods and response format.

Direct API:

• API Docs: v2-listings-api.md | v2-vin-apis.md | v2-plate-api.md | v1-apis.md
• Workflows: chaining-patterns.md | interactive-explorer.md | business-workflows.md
• Code Gen: code-patterns.md | app-scaffolding.md | integration-recipes.md
• Other: error-recovery.md | pricing.md | examples.md