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# Extensions \[Community-built tools and integrations for MPP]

Third-party packages that extend MPP with new payment methods, middleware, and utilities.

| Name | Languages | Description | Link |
|---|---|---|---|
| `@insumermodel/mppx-condition-gate` | TypeScript, JavaScript | Condition-based access for mppx routes—free access for wallets that meet token, NFT, EAS attestation, or Farcaster ID conditions across 33 chains, returned as ECDSA-signed attestations | [npm](https://www.npmjs.com/package/@insumermodel/mppx-condition-gate) · [GitHub](https://github.com/douglasborthwick-crypto/mppx-condition-gate) |
| `mpp-inspector` | TypeScript, JavaScript | CLI toolkit to inspect, debug, and test HTTP 402 MPP endpoints—parse Challenges, verify Receipts, compare pricing, and dry-run payment flows | [npm](https://www.npmjs.com/package/mpp-inspector) · [GitHub](https://github.com/amgb20/MPP-Inspector) |
| `x402-proxy` | TypeScript, JavaScript | `curl` for MPP and x402 paid APIs—auto-pays one-shot charges and session-based streaming (per-token voucher cycling), with built-in wallet management (EVM + Solana), spend limits, and MCP stdio proxy for AI agents | [npm](https://www.npmjs.com/package/x402-proxy) · [GitHub](https://github.com/cascade-protocol/x402-proxy) |
| `@quicknode/mpp` | TypeScript, JavaScript | Extends MPP with payments on Ethereum, Base, and other EVM networks, with support for `permit2`, EIP-3009 `authorization` and `hash` Credential types | [npm](https://www.npmjs.com/package/@quicknode/mpp) · [GitHub](https://github.com/quiknode-labs/mpp) |
| `@bolyra/mpp` | TypeScript, JavaScript | Delegated spend mandates for mppx routes — verify an agent's operator-signed authorization and financial tier before accepting a payment credential; emits signed authorization receipts alongside the Payment-Receipt | [npm](https://www.npmjs.com/package/@bolyra/mpp) · [GitHub](https://github.com/bolyra/bolyra/tree/main/integrations/mpp-payments) |

Want to build your own? See [Custom payment methods](/payment-methods/custom).