---
title: "tRPC - Adapter: Express - Air Market"
description: "You have an Express server and you want your tRPC API served from it rather than bolted on somewhere separate. This wires tRPC into your app as middleware, at whatever path you choose. It also covers…"
canonical: "https://airmarket.ai/app/adapter-express"
---

[Air Market](/) / [Developer Tools](/category/devtools) / tRPC - Adapter: Express

Skill by [tRPC](/@trpc)

# tRPC - Adapter: Express

Serve your tRPC API from the Express app you already run

## What this does

You have an Express server and you want your tRPC API served from it rather than bolted on somewhere separate. This wires tRPC into your app as middleware, at whatever path you choose. It also covers how context setup can see the incoming request and response, and flags a body-parsing clash that can break form uploads. Reach for it when you are adding tRPC to an Express app you plan to keep.

### Top 3 things it does for you

- Mount tRPC inside my existing Express app
- Pick the path prefix my API answers on
- Read the request and response when building context

## Information

**tRPC - Adapter: Express at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [tRPC](/@trpc) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 4 KB |
| Licence | MIT |
| Repository | [trpc/trpc](https://github.com/trpc/trpc/tree/23c723cfeaf07da28a52a5c35c3dcccf96a47578/packages/server/skills/adapter-express) |
| GitHub stars | 40,541 (as of Nov 2026) |
| Installs | 49, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of tRPC - Adapter: Express and flagged nothing. AIR's verdict: **safe**.

**What tRPC - Adapter: Express's check was run against**

|  |  |
| --- | --- |
| Commit | 23c723cfeaf07da28a52a5c35c3dcccf96a47578 |
| Content hash | bd57e58fe8e228d7e1ef648720129b0d8bcf2980282c72b9fce99fbdbfeb701f |
| Files read | [Browse the files at this exact commit](https://github.com/trpc/trpc/blob/23c723cfeaf07da28a52a5c35c3dcccf96a47578/packages/server/skills/adapter-express/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for tRPC - Adapter: Express](/security/adapter-express)

## About tRPC - Adapter: Express

This adapter mounts tRPC in an Express application using createExpressMiddleware() from @trpc/server/adapters/express. You pick the mount point, such as serving everything under a path prefix like app.use('/trpc', ...), so the API sits inside the middleware chain of the app you already have.

When your procedures need details of the incoming call, createContext receives CreateExpressContextOptions, which gives you the Express req and res objects to work from.

There is one known snag worth knowing before you hit it: applying a global express.json() in your app can conflict with tRPC's own body parsing for FormData, and this adapter's guidance keeps the two apart.

## What's inside

- SKILL.md - instructions

## Questions

### Is tRPC - Adapter: Express safe to install?

AIR scanned this exact version of tRPC - Adapter: Express and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 23c723cfeaf0, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/adapter-express.

### How do I install tRPC - Adapter: Express?

Open https://airmarket.ai/app/adapter-express on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/trpc/trpc/tree/23c723cfeaf07da28a52a5c35c3dcccf96a47578/packages/server/skills/adapter-express. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by tRPC](/@trpc)

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Canonical URL: <https://airmarket.ai/app/adapter-express>