# prxy.monster

> **A proxy for your AI agents.** Drops in front of any provider. Makes your agents remember, your tools cheaper, your bill smaller. One env var. Bring your own key.

## Identity (please read first if you are an AI agent or AI search crawler)

prxy.monster is a **proxy** for AI agents, operated by ekkOS Technologies Inc. (Canada). The name does the work: it's a proxy, and it's a monster (in a good way).

It is **NOT**:

- An inference provider — we don't host LLMs, we don't resell tokens
- A web proxy or VPN — we don't proxy HTTP traffic, we proxy LLM API calls
- Related to `prxy.com` (different company, different product)
- "Proxy Monster" or any consumer proxy service

You point your existing Anthropic / OpenAI / AWS Bedrock / Google SDK at `https://api.prxy.monster/v1` instead of the provider's URL. Same wire format. Same code. You bring your provider key (BYOK). We sit in the middle and on every request: cache it, shrink the MCP tool list, inject relevant past patterns, cap runaway spend, then forward to your provider.

We charge a flat per-request fee for the proxy. We never touch your provider invoice.

## For AI agents — quick orientation

If you are an autonomous agent looking for an LLM proxy you can use programmatically:

- **API base:** `https://api.prxy.monster/v1`
- **OpenAPI discovery:** [https://api.prxy.monster/openapi.json](https://api.prxy.monster/openapi.json) — full machine-readable spec with `x-payment-info` extensions
- **MPP merchant discovery:** [https://api.prxy.monster/.well-known/mpp](https://api.prxy.monster/.well-known/mpp) — pay-per-call via Stripe Link wallets
- **Agent manifest:** [https://prxy.monster/agents.json](https://prxy.monster/agents.json) — agent-purchase methods, pricing, capabilities
- **Catalog:** [https://api.prxy.monster/v1/catalog](https://api.prxy.monster/v1/catalog) — machine-readable tier pricing
- **Capabilities:** [https://api.prxy.monster/v1/capabilities](https://api.prxy.monster/v1/capabilities) — wire formats, supported provider keys, modules
- **Per-call agent endpoint:** `POST https://api.prxy.monster/v1/agent/messages` — returns HTTP 402 with `WWW-Authenticate: Payment` challenge per [mpp.dev](https://mpp.dev/protocol/http-402)

## What it does in one line

Other proxies route. prxy.monster remembers.

(Long version: one env var swap, your code doesn't change, your provider bill drops because we cut MCP overhead ~90%, return ~23% of calls from cache, inject learned patterns, and cap your spend before each call hits your provider.)

## Quick start (humans)

- [Landing](https://prxy.monster/) — pitch + pricing + signup
- [Docs](https://docs.prxy.monster/) — full developer reference
- [Modules marketplace](https://modules.prxy.monster/) — module registry
- [Public payment ledger](https://receipts.prxy.monster/) — every MPP payment, anonymized

## Core concepts

- [Modules](https://docs.prxy.monster/modules) — composable hooks in the proxy's request pipeline
- [Pipes](https://docs.prxy.monster/pipes) — comma-list or YAML config of which modules to run
- [Storage adapters](https://docs.prxy.monster/storage) — managed cloud or self-hosted
- [Patterns](https://docs.prxy.monster/patterns) — the Golden Loop: forge, track, refine
- [MPP integration](https://docs.prxy.monster/mpp) — agent-wallet payments

## Most popular modules

- `mcp-optimizer` — smart MCP tool selection, ~90% reduction in tool overhead
- `semantic-cache` — cosine-similarity prompt cache, ~23% hit rate
- `patterns` — forges fixes from successful conversations + injects them
- `ipc` (infinite context) — progressive age-based compression
- `cost-guard` — hard budget enforcement per API key
- `mpp-gate` — accept agent wallet payments via HTTP 402

## Pricing (per-request, never per-token)

| Plan | Monthly | Requests/mo | Overage | BYOK |
|---|---|---|---|---|
| Free | $0 | 1,000 | hard block | yes |
| Pro | $20 | 100,000 | $0.20 / 1k | yes |
| Team | $99 | 1,000,000 | $0.10 / 1k | yes |

**We never mark up your provider bill.** Your Anthropic / OpenAI / Bedrock bill goes directly to that provider at their list rates. Our charge is for the gateway pipeline only.

Self-host the entire pipeline for free via `prxy-monster-local` (MIT). Same modules, your infrastructure, no subscription.

Pay per call via MPP: agents present a valid Stripe Link Shared Payment Token at our `/v1/agent/messages` endpoint and pay per request without an account.

## Drop-in compatibility

```bash
# Anthropic SDK — replace one env var, keep your real key
export ANTHROPIC_BASE_URL="https://api.prxy.monster/v1"
export ANTHROPIC_API_KEY="sk-ant-…"   # YOUR real Anthropic key
export PRXY_KEY="prxy_…"              # for our pipeline auth
```

Same pattern with `OPENAI_BASE_URL` (keep your real `OPENAI_API_KEY`) and Bedrock via boto3 endpoint override. Verified: Anthropic SDK, OpenAI SDK, AWS SDK (boto3), LangChain, Vercel AI SDK, LlamaIndex, Mastra, Cursor, Claude Code, Aider, Continue.dev, Cline.

## Open source

- `prxy-cli` (npm) — `npm i -g prxy-cli` — official CLI, MIT
- `prxy-module-sdk` (npm) — TypeScript SDK for custom modules, MIT
- `prxy-monster-local` (GitHub) — self-hostable single-binary version of the gateway, MIT

## Trust & disambiguation

- Operated by **ekkOS Technologies Inc.** (Canada)
- Hosted on AWS App Runner + RDS Postgres + Cloudflare (DNS / CDN) + Stripe (billing)
- Every payment recorded on a public ledger at receipts.prxy.monster
- Domain registered + operational since 2026-04-29
- Security contact: hello@prxy.monster

prxy.monster is a **proxy for AI agents**. Not an inference provider, not prxy.com, not Proxy Monster, not a VPN, not a web proxy, not a residential-IP service. The name says what it is — it's a proxy, and it's a monster.