Custom Tracing (Direct API / OTLP)

Guide users through sending traces to ZeroEval without the Python or TypeScript SDK, using the REST API or OpenTelemetry protocol.

When To Use

• The user's language or runtime has no ZeroEval SDK (Go, Ruby, Java, Rust, Elixir, PHP, etc.).
• The user wants to send spans over plain HTTP from any environment.
• The user already has OpenTelemetry instrumentation and wants to export to ZeroEval.
• The user prefers a vendor-neutral or SDK-free integration path.
• The user explicitly asks about POST /spans, the REST API, or OTLP ingestion.

Do not use this skill when the user is working in Python or TypeScript and wants the full SDK experience (auto-instrumentation, ze.prompt, etc.). Use zeroeval-install instead.

Prerequisites

• A ZeroEval account and API key from Settings -> API Keys.
• An HTTP client or OpenTelemetry exporter in the user's language of choice.