| What it does | One OpenAI-compatible AI gateway for production AI with adaptive routing, load balancing, guardrails, agent firewall, observability and governance across 200+ models
| API for sending handwritten letters through AI agents and assistants
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| DE
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| Pricing | Hacker (Free): Full gateway with 200+ models, OpenAI-compatible API, automatic failover, basic observability, 10 API keys, zero token markup. Team ($499/mo): Everything in Hacker plus up to 10 team seats, compliance enforcement and reports, unlimited API keys, priority support. Enterprise (Custom):
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| Key features | - Adaptive routing across 200+ models graded in under 1 millisecond
- OpenAI-compatible endpoint requiring only a one-line code change
- Automatic failover with fallback chain configuration
- PII Shield and content policy guardrails enforced before billing
- Agent firewall grading tool and MCP calls before execution
- Prompt versioning and management without code redeployment
- Request logging with grade, model, latency and cost on every call
- Prompt caching with provider's cache rate billing
- Compliance packs mapped to 32 regulatory frameworks
- Quantum-safe encryption for stored request logs with open-source code
| - Agent policy configuration with send limits and approval settings
- Relationship management with contact details restricted from API
- Moment tracking for birthdays and anniversaries
- Letter quote and pricing with customizable upgrades
- Real-time send tracking with multiple status states
- Address request generation with privacy protection
- Webhook event system with signature verification
- OAuth support for custom connectors like Claude
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| What makes it different | - Data privacy by default - prompts not logged unless explicitly enabled
- Single integration point for 200+ models eliminating provider lock-in
- Adaptive routing with 75.5% accuracy on public RouterArena leaderboard
- Governance without requiring separate systems for policy and observability
| - Same API primitives used in the app itself
- Hands-on compliance with frequency limits and approval workflows
- Model Context Protocol integration for AI assistants
- Hosted MCP server with no installation required
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| Community votes | 0 | 0 |
| DR (Domain Rating by Ahrefs) | 72 ● no change since last check | Not checked yet ● no change since last check |
| Trust Flow (Majestic) | 19 | 0 |
| Citation Flow (Majestic) | 48 | 0 |
| Referring domains (Majestic) | 1841 | 0 |