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Add the Docs MCP to your AI coding tool to get help building with Respan. No API key needed.
{
  "mcpServers": {
    "respan-docs": {
      "url": "https://docs.respan.ai/mcp"
    }
  }
}

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What is Replicate?

Replicate is a platform for running machine learning models in the cloud. The Replicate Python SDK lets you run open-source models with a simple API. Respan can auto-instrument all Replicate calls for tracing and observability.
Replicate uses a different API format, so only Tracing setup is available. Gateway routing is not directly supported.

​
Setup

1

Install packages

pip install respan-ai opentelemetry-instrumentation-replicate replicate python-dotenv
2

Set environment variables

export REPLICATE_API_TOKEN="YOUR_REPLICATE_API_TOKEN"
export RESPAN_API_KEY="YOUR_RESPAN_API_KEY"
3

Initialize and run

import os
from dotenv import load_dotenv

load_dotenv()

import replicate
from respan import Respan

# Auto-discover and activate all installed instrumentors (Traceloop)
respan = Respan(is_auto_instrument=True)

# Calls go directly to Replicate, auto-traced by Respan
output = replicate.run(
    "meta/meta-llama-3-70b-instruct",
    input={"prompt": "Say hello in three languages."},
)
print("".join(output))
respan.flush()
4

View your trace

Open the Traces page to see your auto-instrumented LLM spans.

​
Configuration

ParameterTypeDefaultDescription
api_keystr | NoneNoneFalls back to RESPAN_API_KEY env var.
base_urlstr | NoneNoneFalls back to RESPAN_BASE_URL env var.
is_auto_instrumentbool | NoneFalseAuto-discover and activate all installed instrumentors via OpenTelemetry entry points.
customer_identifierstr | NoneNoneDefault customer identifier for all spans.
metadatadict | NoneNoneDefault metadata attached to all spans.
environmentstr | NoneNoneEnvironment tag (e.g. "production").

​
Attributes

Attach customer identifiers, thread IDs, and metadata to spans.

​
In Respan()

Set defaults at initialization — these apply to all spans. 
from respan import Respan

respan = Respan(
    is_auto_instrument=True,
    customer_identifier="user_123",
    metadata={"service": "inference-api", "version": "1.0.0"},
)

​
With propagate_attributes

Override per-request using a context manager. 
import replicate
from respan import Respan, workflow, propagate_attributes

respan = Respan(
    is_auto_instrument=True,
    metadata={"service": "inference-api", "version": "1.0.0"},
)

@workflow(name="handle_request")
def handle_request(user_id: str, question: str):
    with propagate_attributes(
        customer_identifier=user_id,
        thread_identifier="conv_001",
        metadata={"plan": "pro"},
    ):
        output = replicate.run(
            "meta/meta-llama-3-70b-instruct",
            input={"prompt": question},
        )
        print("".join(output))
AttributeTypeDescription
customer_identifierstrIdentifies the end user in Respan analytics.
thread_identifierstrGroups related messages into a conversation.
metadatadictCustom key-value pairs. Merged with default metadata.

​
Decorators

Use @workflow and @task to create structured trace hierarchies. 
import replicate
from respan import Respan, workflow, task

respan = Respan(is_auto_instrument=True)

@task(name="generate_outline")
def outline(topic: str) -> str:
    output = replicate.run(
        "meta/meta-llama-3-70b-instruct",
        input={"prompt": f"Create a brief outline about: {topic}"},
    )
    return "".join(output)

@workflow(name="content_pipeline")
def pipeline(topic: str):
    plan = outline(topic)
    output = replicate.run(
        "meta/meta-llama-3-70b-instruct",
        input={"prompt": f"Write content from this outline: {plan}"},
    )
    print("".join(output))

pipeline("Benefits of API gateways")
respan.flush()

​
Examples

​
Basic run

output = replicate.run(
    "meta/meta-llama-3-70b-instruct",
    input={"prompt": "Say hello in three languages."},
)
print("".join(output))