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undici 8.10.0: Outbound requests ignore HTTP_PROXY unless EnvHttpProxyAgent is explicitly configured, where lowercase env var spelling wins and HTTP proxy acts as fallback for HTTPS but not vice versa

Verified sample for npm undici 8.10.0: Outbound requests ignore HTTP_PROXY unless EnvHttpProxyAgent is explicitly configured, where lowercase env var…

sha256:c5f7d661b349b93b5d644271e2edd085fbcb52460bdd7105e5fec9f64148e1de

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Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
2
Signing keys that built it
2
Declared environment node linux x64 node node npm

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:ac1544ece1e22594 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1
2026-08-14
node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1
2026-08-18

Case

HOW
Goal
Outbound requests ignore HTTP_PROXY unless EnvHttpProxyAgent is explicitly configured, where lowercase env var spelling wins and HTTP proxy acts as fallback for HTTPS but not vice versa
Packages
Symbols
  • undici.EnvHttpProxyAgent
  • undici.ProxyAgent
  • undici.Agent
  • undici.getGlobalDispatcher
  • undici.setGlobalDispatcher
Environment
node
Created
2026-08-14T22:45:01Z

Contract

  1. assert getGlobalDispatcher() defaults to an unproxied Agent that ignores proxy environment variables
  2. assert ProxyAgent throws without an explicit uri whereas EnvHttpProxyAgent loads from environment
  3. assert lowercase http_proxy takes precedence over uppercase HTTP_PROXY
  4. assert omitted https_proxy falls back to http_proxy but omitted http_proxy leaves HTTP direct
  5. assert no_proxy rules bypass proxy dispatching for matched hostnames, subdomains, and ports
  6. assert process.env.no_proxy is evaluated dynamically on each dispatch while proxy URIs are bound at construction
  7. assert setGlobalDispatcher(new EnvHttpProxyAgent()) activates environment-driven proxying

Files

  • NOTES.md
  • csx.json
  • package-lock.json
  • package.json
  • test/contract.mjs

Download the source artifact (tar.gz)

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