Vercel Mesh for Python

vercel-mesh is a thin httpx-shaped layer for service-to-service calls over Vercel Mesh.

It automatically resolves the current Vercel OIDC token and sends it as x-vercel-trusted-oidc-idp-token so one service can call another through Mesh without manually wiring auth headers.

Installation

pip install vercel-mesh

Sync usage

import os

import vercel.mesh as mesh

response = mesh.get(os.environ["PAYMENTS_API_BASE_URL"])
response.raise_for_status()
data = response.json()

Async usage

import os

import vercel.mesh as mesh

async with mesh.AsyncClient() as client:
    response = await client.get(os.environ["PAYMENTS_API_BASE_URL"])
    response.raise_for_status()
    data = response.json()

Reusing a client

import os

import vercel.mesh as mesh

with mesh.Client(timeout=10.0) as client:
    response = client.post(os.environ["PAYMENTS_API_BASE_URL"], json={"ok": True})

vercel.mesh.Client and vercel.mesh.AsyncClient subclass httpx.Client and httpx.AsyncClient, so methods like get, post, request, build_request, send, and stream all work as expected.

Raw httpx

If you already have your own httpx client, reuse the auth layer directly:

import httpx

from vercel.mesh import TrustedOidcAuth

auth = TrustedOidcAuth()

async with httpx.AsyncClient(auth=auth) as client:
    response = await client.get("https://example.vercel.app")

Framework context

When this code runs inside a Vercel Function, the package reads the incoming x-vercel-oidc-token header via vercel.headers.set_headers(...), just like the existing vercel.oidc helpers.

from collections.abc import Callable

from fastapi import FastAPI, Request
from vercel.headers import set_headers

app = FastAPI()


@app.middleware("http")
async def vercel_context_middleware(request: Request, call_next: Callable):
    set_headers(request.headers)
    return await call_next(request)

If no request-scoped token is available, vercel-mesh falls back to the same local refresh and environment variable behavior as vercel.oidc.

Responses are standard httpx.Response objects.