Compare
Cooper Email vs PostalDataPI
PostalDataPI provides global address data, not email inboxes for agents.
Cooper EmailGive every AI agent its own inbox
PostalDataPIOne API, 240+ countries and territories, sub-5ms, $0.000028/query flat.
Which to pick
Pick Cooper Email if you want…
- API inboxes for AI agents
- Open-source code (cooper-email/cooper-email on GitHub, MIT license)
- Integrations with Claude, ChatGPT or Cursor (on Cooper Email's list, not PostalDataPI's)
Pick PostalDataPI if you want…
- Flat-rate global postal code API
- Geolocation data
- Integrations with Python or MCP server (on PostalDataPI's list, not Cooper Email's)
Side by side
- What it is
- Cooper Email:Cooper Email provides an API that gives AI agents a real email inbox (and optional phone number) with webhooks and full-text search.
- PostalDataPI:PostalDataPI provides a global postal code lookup, validation, and enrichment API with sub-5 ms responses.
- Best for
- Cooper Email:API inboxes for AI agents
- PostalDataPI:Flat-rate global postal code API
- Who it’s for
- Cooper Email:Developers building autonomous AI agents that need email or SMS communication.
- PostalDataPI:Developers needing fast, low-cost postal code data for any country.
- Pricing
- Cooper Email:Freemium
- PostalDataPI:Pay-as-you-go
- Plans
- Cooper Email:Free $0 · Starter $12/mo per month · Pro $99/mo per month
- PostalDataPI:Pay-as-you-go $0.000028 per query
- Open source
- Cooper Email:Yes, 0 GitHub stars
- PostalDataPI:—
- Works with
- Cooper Email:Claude, ChatGPT, Cursor, VS Code, Codex CLI
- PostalDataPI:Python, MCP server
Cooper Email features
- One-click inbox creation. POST /onboard returns an API key and a unique @cooperemail.com address in a single request.
- Signed inbound webhooks. Incoming email arrives as a signed webhook for immediate processing by the agent.
- Full-text searchable mail. All messages are indexed with SQLite FTS5, searchable via GET /search.
- Custom domains. Starter and Pro plans support custom domains with automatic DNS when using Cloudflare.
- Phone numbers & SMS. Buy US numbers ($3/mo each) to receive texts stored as inbox messages with webhook alerts.
- Hosted MCP integration. Connect agents via the hosted MCP server for Claude, ChatGPT, Cursor, and other tools.
PostalDataPI features
- 240+ country coverage. Lookup postal codes for more than 240 countries and territories.
- Sub-5 ms latency. Cached responses return in under five milliseconds.
- Flat per-query pricing. All queries cost $0.000028, no tiers or contracts.
- Free starter quota. New accounts receive 1,000 free queries without a credit card.
- Python SDK. Official client library for Python developers.
- Node SDK. Official client library for Node.js developers.
- MCP server. Self-hosted server for AI agents to query the API.
- Auto-recharge option. Balance can be recharged manually or automatically.
Cooper Email vs PostalDataPI FAQ
Is Cooper Email or PostalDataPI free?+
Cooper Email has a free plan; paid plans start at $12/month (Starter).
Is Cooper Email or PostalDataPI open source?+
Cooper Email is open source (cooper-email/cooper-email on GitHub, MIT license). DevHunt has no public source repository on record for PostalDataPI.
Do Cooper Email and PostalDataPI integrate with the same tools?+
Their integration lists don't overlap: Cooper Email lists Claude, ChatGPT, Cursor, VS Code and 1 more; PostalDataPI lists Python and MCP server.
On DevHunt
Based on each tool's website and DevHunt data. Details may change; check the official sites.