[Bug]: Unable to Access Helicon YOUR_HOST URL - SyntaxError in clickhouse-migration-runner

TL;DR

For "SyntaxError: EOL while scanning string literal": resolved by a community member (tscodeler): the multi-line f-string in ch\hcone.py's runcurlcommand is broken in the local checkout, fix the string formatting in that function so the curl command is a single valid f-string, and add the MINIO env vars to the docker.env file (MINIOROOTUSER and MINIOROOT_PASSWORD).

SyntaxError: EOL while scanning string literal

Steps

1. Resolved by a community member (tscodeler): the multi-line f-string in ch_hcone.py's runcurlcommand is broken in the local checkout, fix the string formatting in that function so the curl command is a single valid f-string, and add the MINIO env vars to the docker .env file (MINIOROOTUSER and MINIOROOTPASSWORD). Maintainer connortbot later closed it noting the self-hosting docs were reworked: current flow is ./helicone_compose up helicone per https://docs.helicone.ai/getting-started/self-host/docker.

When to use

You are seeing this: Self-hosting Helicone locally: the service URL for that host and port unreachable; the clickhouse-migration-runner exits with SyntaxError: EOL while scanning string literal at curl\cmd = f"cat \"{migration\file}\" | curl '{... in chhcone.py. Use this skill when you run into "[Bug]: Unable to Access Helicon YOURHOST URL - SyntaxError in clickhouse-migration-runner".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

Sources

• https://docs.helicone.ai/getting-started/self-host/docker

In gh:Helicone/helicone#2965 (https://github.com/Helicone/helicone/issues/2965), the question was: Self-hosting Helicone locally: the service URL for that host and port unreachable; the clickhouse-migration-runner exits with SyntaxError: EOL while scanning string literal at curl_cmd = f"cat \"{migration_file}\" | curl '{ ... in chhcone.py. The verified resolution: Resolved by a community member (tscodeler): the multi-line f-string in `chhcone.py's run_curl_command is broken in the local checkout, fix the string formatting in that function so the curl command is a single valid f-string, and add the MINIO env vars to the docker .env file (MINIO_ROOT_USER and MINIO_ROOT_PASSWORD). Maintainer connortbot later closed it noting the self-hosting docs were reworked: current flow is ./helicone_compose up helicone` per https://docs.helicone.ai/getting-started/self-host/docker.