fix(llms): normalize scheme and port in Ollama base URL by parthiban-sivakumar · Pull Request #7206 · crewAIInc/crewAI

parthiban-sivakumar · 2026-09-02T10:37:27Z

Problem

OLLAMA_HOST follows Ollama's own convention, where a bare host or a host:port pair is normal — Ollama's client fills in the scheme and port itself. CrewAI's _normalize_ollama_base_url only appended /v1, so any OLLAMA_HOST without a scheme produced an invalid base URL.

With OLLAMA_HOST=0.0.0.0 set (the standard way to make the Ollama server listen on all interfaces):

>>> from crewai import LLM
>>> LLM(model="ollama/llama3.2").base_url
'0.0.0.0/v1'

Every call then fails:

ERROR:root:Failed to connect to OpenAI API: Connection error.
ERROR:root:OpenAI API call failed: Failed to connect to OpenAI API: Connection error.

The message names OpenAI even though a local Ollama model was requested, because ollama/* routes to OpenAICompatibleCompletion. That sends users debugging API keys and networking rather than a malformed URL.

Affected values — 6 of 9 realistic forms, including 127.0.0.1:11434, Ollama's documented default:

`OLLAMA_HOST`	Before	After
`0.0.0.0`	`0.0.0.0/v1` ❌	`http://0.0.0.0:11434/v1`
`localhost`	`localhost/v1` ❌	`http://localhost:11434/v1`
`127.0.0.1:11434`	`127.0.0.1:11434/v1` ❌	`http://127.0.0.1:11434/v1`
`192.168.1.5:11434`	`192.168.1.5:11434/v1` ❌	`http://192.168.1.5:11434/v1`
`http://localhost:11434`	`http://localhost:11434/v1` ✅	unchanged
`https://ollama.example.com`	`https://ollama.example.com/v1` ✅	unchanged

Fix

Fill in whatever is missing, mirroring Ollama's client behaviour:

Prepend http:// when no scheme is present
Append port 11434 when no port is present and the scheme is http (https implies 443, so no port is added)
Append /v1 when missing

Uses urlsplit/urlunsplit rather than string manipulation so the netloc and path stay correctly separated and query/fragment survive.

Testing

Five cases added to TestNormalizeOllamaBaseUrl covering bare hosts, host:port without a scheme, and an explicit https:// URL. The four existing tests are unchanged and act as regression guards.

lib/crewai/tests/llms/ — 630 passed, 20 skipped. ruff, ruff-format and mypy all clean.

Verified end to end against a live Ollama server, with no explicit base_url passed:

OLLAMA_HOST=0.0.0.0          -> http://0.0.0.0:11434/v1     -> OK
OLLAMA_HOST=127.0.0.1:11434  -> http://127.0.0.1:11434/v1   -> OK

Note

A non-numeric port (http://host:abc) makes parts.port raise ValueError, which propagates. I've left that as a loud failure rather than swallowing it, but happy to change if you'd prefer explicit handling.

This PR was written with AI assistance and should carry the llm-generated label per CONTRIBUTING.md. I don't have permission to apply labels on this repo — could a maintainer add it? The commit also carries a Co-Authored-By trailer for the same reason.

OLLAMA_HOST follows Ollama's own convention and may be a bare host ("0.0.0.0") or a host:port pair ("127.0.0.1:11434") rather than a full URL. _normalize_ollama_base_url only appended "/v1", so those values produced invalid base URLs such as "0.0.0.0/v1", and every request failed with the misleading error "Failed to connect to OpenAI API: Connection error." - confusing, since no OpenAI model was requested. Fill in the missing parts the way Ollama's own client does: prepend http:// when no scheme is present, append the default port 11434 when none is present and the scheme is http (https implies 443), then append the /v1 suffix the OpenAI-compatible endpoint requires. Six of nine realistic OLLAMA_HOST forms were affected, including 127.0.0.1:11434, which is Ollama's documented default. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

coderabbitai · 2026-09-02T10:38:29Z

No actionable comments were generated in the recent review. 🎉

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📒 Files selected for processing (2)

lib/crewai/src/crewai/llms/providers/openai_compatible/completion.py
lib/crewai/tests/llms/openai_compatible/test_openai_compatible.py

🚧 Files skipped from review as they are similar to previous changes (1)

lib/crewai/src/crewai/llms/providers/openai_compatible/completion.py

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📝 Walkthrough

Walkthrough

The Ollama base URL helper now adds missing schemes and the default HTTP port, preserves query values, and appends /v1. Tests cover bare hosts, scheme-less host-port values, explicit HTTPS URLs, and query handling.

Changes

Ollama URL normalization

Layer / File(s)	Summary
Normalize and validate Ollama URLs `lib/crewai/src/crewai/llms/providers/openai_compatible/completion.py`, `lib/crewai/tests/llms/openai_compatible/test_openai_compatible.py`	The helper uses URL parsing to add `http://`, apply port `11434` for HTTP URLs without a port, preserve HTTPS URLs and query values, and append `/v1`. Tests cover bare hosts, scheme-less host-port values, explicit HTTPS URLs, and trailing slashes in query values.

Merge Risk: ⚪ Minimal · up to b9d53

The change normalizes Ollama base URLs for common host, port, and scheme formats while preserving existing valid URLs. No actionable merge-blocking risk remains beyond normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the primary change: normalizing the scheme and port in Ollama base URLs.
Description check	✅ Passed	The description identifies issue `#7205`, explains the problem and solution, documents testing and verification, and provides additional context. It uses different headings from the template, but it con…
Linked Issues check	✅ Passed	The implementation satisfies issue `#7205` by adding the HTTP scheme for scheme-less values, adding port 11434 when required, preserving HTTPS behavior, appending /v1, and preserving query and fragment …
Out of Scope Changes check	✅ Passed	The code and test changes are directly related to Ollama base URL normalization and the requirements in issue `#7205`. No unrelated changes are identified.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 2 files.

Full details: Description check

Explanation

The description identifies issue #7205, explains the problem and solution, documents testing and verification, and provides additional context. It uses different headings from the template, but it contains the required information and is mostly complete.

Full details: Linked Issues check

Explanation

The implementation satisfies issue #7205 by adding the HTTP scheme for scheme-less values, adding port 11434 when required, preserving HTTPS behavior, appending /v1, and preserving query and fragment data. The added tests cover the required bare-host and scheme-less host-port cases.

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Inline comments:
In `@lib/crewai/src/crewai/llms/providers/openai_compatible/completion.py`:
- Line 114: Update the URL normalization in the OpenAI-compatible provider to
parse the URL before trimming, then apply rstrip("/") only to the parsed path
rather than the complete URL. Preserve query and fragment values exactly,
including trailing slashes, and ensure root paths with queries do not produce a
doubled slash when rebuilding the URL. Add regression coverage for both cases.

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parthiban-sivakumar · 2026-09-02T10:55:51Z

Some context on how long this has been around, from digging through the history:

_normalize_ollama_base_url was introduced in #5042 (7f5ffce, 2026-03-24), the PR that moved Ollama from LiteLLM onto the native OpenAI-compatible provider. git log -L shows the function was never modified after that commit, so the scheme/port gap has been present in every release since — about five months.

It likely went unreported that long because the failure mode hides well:

Anyone passing base_url= explicitly, or not setting OLLAMA_HOST at all, gets the correct http://localhost:11434/v1 default and sees nothing wrong.
The error says Failed to connect to OpenAI API: Connection error., which points at API keys and networking rather than at a malformed URL. Printing llm.base_url isn't an obvious debugging step.
The existing TestNormalizeOllamaBaseUrl cases all pass URLs that already have a scheme and port, so the bare-host path had no coverage and the suite stayed green.

There's related history worth noting, though none of it duplicates this: #1337 (2024) and #3609 (2025) are both "can't reach my Ollama server" reports from the LiteLLM era, so they predate this code and have a different cause. #3610 was a community PR that tried to address that class of problem by adding URL validation and clearer error messages, but it was closed unmerged. This PR takes the other approach — normalizing the URL so the failure doesn't occur, rather than explaining it after the fact.

Happy to add validation on top if maintainers would prefer both.

Vidit-Ostwal · 2026-09-02T11:15:54Z

Hey @parthiban-sivakumar, Thanks for this.
Mind syncing with the main and resolving the code rabbit review comment.

feel free to tag me for a review.

…a-base-url-normalization

Stripping trailing slashes from the whole URL before parsing corrupted inputs that carry a query or fragment. "http://ollama/?tenant=acme" kept a "/" path and produced a doubled "//v1", and a query or fragment ending in "/" silently lost that character. Parse first, then rstrip only parts.path. Adds regression tests for a root path alongside a query and for a query value ending in "/". Reported by CodeRabbit on crewAIInc#7206. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

parthiban-sivakumar · 2026-09-02T11:21:32Z

@Vidit-Ostwal both done, ready for review.

Synced with main — merged upstream/main (b608a35, 19 commits) into the branch, no conflicts.

Resolved the CodeRabbit comment — it was a real bug in my own fix. Stripping trailing slashes from the whole URL before parsing corrupted inputs carrying a query or fragment:

http://ollama/?tenant=acme  ->  http://ollama:11434//v1?tenant=acme   (doubled slash)
http://ollama:11434/?x=a/   ->  http://ollama:11434//v1?x=a          (query lost its trailing /)

Fixed in b9d534d by parsing first and stripping only parts.path, plus two regression tests for those cases. Replied on the review thread with the details.

Validation on the merged branch: lib/crewai/tests/llms/ — 654 passed, 20 skipped; ruff, ruff-format and mypy clean. Re-verified end to end against a live Ollama server with OLLAMA_HOST=0.0.0.0 and no explicit base_url — resolves to http://0.0.0.0:11434/v1 and returns a completion.

One outstanding item I can't do myself: this PR and #7205 need the llm-generated label per CONTRIBUTING.md, and outside contributors can't apply labels. Could you add it?

parthiban-sivakumar · 2026-09-02T11:38:54Z

Hi @Vidit-Ostwal,

Quick follow-up on the two red checks — neither looks related to this PR:

tests — the failures are in tests/llms/azure/test_azure_responses.py. They pass locally on this branch, and the workflow is red on main too.
pip-audit — red on main as well, including b608a359, the commit I merged.

Happy to look at either separately if useful, just didn't want to widen this PR.

Thanks!

Vidit-Ostwal

Reviewed against current main and #7205.

The helper change matches the bug: _normalize_ollama_base_url only appended /v1, so scheme-less OLLAMA_HOST values (127.0.0.1:11434, 0.0.0.0) became invalid client URLs. Filling in http://, default port 11434 for http only, and /v1 via urlsplit/urlunsplit is the right shape. The CodeRabbit path-strip issue is fixed (b9d534d); query/fragment cases look correct. Tests cover the previously missing bare-host and host:port forms.

Already synced with main. No rebase needed. I added the llm-generated label.

Nits, not blockers:

Trailing whitespace on the blank line after test_handles_v1_with_trailing_slash.
CLI _ollama_base() still only prepends http:// and does not add port 11434. Out of scope here, but OLLAMA_HOST=0.0.0.0 will keep resolving to http://0.0.0.0 in the model catalog after this lands.

Docs are out of scope for this PR. Live docs/edge Ollama examples already pass a full base_url="http://localhost:11434", so they never hit this bug. They are stale on native vs LiteLLM (ollama/ is native now; llms.mdx and the LiteLLM removal guide still say otherwise). Follow-up, not this diff.

Looks good to merge from my side.

parthiban-sivakumar and others added 2 commits August 27, 2026 18:01

Merge branch 'main' into parthiban/fix/ollama-base-url-normalization

191fc35

parthiban-sivakumar mentioned this pull request Sep 2, 2026

fix(llms): normalize scheme and port in Ollama base URL #7132

Closed

coderabbitai Bot reviewed Sep 2, 2026

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Comment thread lib/crewai/src/crewai/llms/providers/openai_compatible/completion.py Outdated

parthiban-sivakumar and others added 2 commits September 2, 2026 16:49

Merge remote-tracking branch 'upstream/main' into parthiban/fix/ollam…

317c7f4

…a-base-url-normalization

Merge branch 'main' into parthiban/fix/ollama-base-url-normalization

ac10c18

Vidit-Ostwal added the llm-generated This was created primarily by an agent, agents, or LLM. label Sep 2, 2026

Vidit-Ostwal self-assigned this Sep 2, 2026

Vidit-Ostwal reviewed Sep 2, 2026

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fix(llms): normalize scheme and port in Ollama base URL - #7206

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