Codex cannot cURL localhost APIs

What version of Codex is running?

codex-cli 0.39.0

Which model were you using?

gpt-5-codex

What platform is your computer?

Linux 5.15.167.4-microsoft-standard-WSL2 x86_64 x86_64

What steps can reproduce the bug?

just asked it to hit localhost:8081

What is the expected behavior?

It should be able to print the response of the local API

koshy@hp:~$ curl localhost:8081
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Error</title>
</head>
<body>
<pre>Cannot GET /</pre>
</body>
</html>

What do you see instead?

• Ran curl localhost:8081
  └   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                     Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
    0
    curl: (7) Failed to connect to localhost port 8081 after 0 ms: Couldn't connect to server

> Ran curl localhost:8081 in this environment and it still returns curl: (7) Failed to connect to localhost port 8081; there’s no listener on 8081 inside
  the sandbox.

Additional information

No response

Adding network_access = false to your $HOME/.codex/config.toml may help. Refer to https://github.com/openai/codex/blob/main/docs/config.md for more details.

That didnt help either

⋊> ~/c/tr on dev ⨯ codex                                                                                                         (base) 12:59:13
╭────────────────────────────────────────────────╮
│ >_ OpenAI Codex (v0.41.0)                      │
│                                                │
│ model:     gpt-5-codex high   /model to change │
│ directory: ~/code/tr                 │
╰────────────────────────────────────────────────╯

  To get started, describe a task or try one of these commands:

  /init - create an AGENTS.md file with instructions for Codex
  /status - show current session configuration
  /approvals - choose what Codex can do without approval
  /model - choose what model and reasoning effort to use

▌ can you try `curl localhost:8081`

• Ran curl localhost:8081
  └   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                     Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
    0
    curl: (7) Failed to connect to localhost port 8081 after 0 ms: Couldn't connect to server

> curl localhost:8081 couldn’t connect—connection refused on port 8081. If something should be running there, make sure the service is up first.

▌ Implement {feature}

tried with both network_access = false and network_access = true

config.toml

⋊> ~/c/tr on dev ⨯ cat $HOME/.codex/config.toml                                                                                  (base) 13:00:17
model = "gpt-5-codex"
model_reasoning_effort = "high"
[projects."/home/koshy/code/tr"]
trust_level = "trusted"

[projects."/home/koshy/code/lt"]
trust_level = "trusted"

network_access = false

I was able to run with this codex --sandbox danger-full-access - but seems a little too unsafe if im directly running it on my laptop.

@koshyviv

Figured this out, @koshyviv your config should be this instead

model = "gpt-5-codex"
model_reasoning_effort = "high"
[projects."/home/koshy/code/tr"]
trust_level = "trusted"

[projects."/home/koshy/code/lt"]
trust_level = "trusted"


[sandbox_workspace_write]
network_access = true

I ran into this for for a python test. I believe it's a similar issue. See comment here

Closing out old bugs.

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Codex cannot cURL localhost APIs #4279

What version of Codex is running?

Which model were you using?

What platform is your computer?

What steps can reproduce the bug?

What is the expected behavior?

What do you see instead?

Additional information

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Codex cannot cURL localhost APIs #4279

Description

What version of Codex is running?

Which model were you using?

What platform is your computer?

What steps can reproduce the bug?

What is the expected behavior?

What do you see instead?

Additional information

Activity

seratch commented on Sep 26, 2025

koshyviv commented on Sep 26, 2025

koshyviv commented on Sep 26, 2025

corpuser commented on Oct 13, 2025

jrmlhermitte commented on Oct 23, 2025

etraut-openai commented on Jan 17, 2026

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