Farcaster Python API Docs | dltHub

Farcaster's REST API documentation is available at https://docs.farcaster.xyz/reference/warpcast/api. It details endpoints for interacting with Farcaster's decentralized social network. The REST API base URL is https://api.farcaster.xyz and all authenticated requests require a self‑signed App Key Bearer token.

dlt is an open-source Python library that handles authentication, pagination, and schema evolution automatically. dlthub provides AI context files that enable code assistants to generate production-ready pipelines. Install with uv pip install "dlt[workspace]" and start loading Farcaster data in under 10 minutes.

---

What data can I load from Farcaster?

Here are some of the endpoints you can load from Farcaster:

---

How do I authenticate with the Farcaster API?

Authenticated endpoints require a self‑signed App Key token sent in the Authorization: Bearer <authToken> header together with Content-Type: application/json for POSTs.

1. Get your credentials

1. Generate an Ed25519 keypair for your application.\n2. Register the public key as an App Key for your Farcaster developer FID in the Farcaster developer dashboard.\n3. Create a JWT‑like token: base64url‑encode a JSON header { fid, type: 'app_key', key: publicKey }, base64url‑encode a payload containing at least an exp (expiration time in seconds), sign the header.payload string with the Ed25519 private key, and concatenate header.payload.signature with periods.\n4. Use the resulting string as the Bearer token in the Authorization header for all authenticated requests.

2. Add them to .dlt/secrets.toml

Copy
[sources.farcaster_source]
app_key = "<base64url_header.base64url_payload.base64url_signature>"

dlt reads this automatically at runtime — never hardcode tokens in your pipeline script. For production environments, see setting up credentials with dlt for environment variable and vault-based options.

---

How do I set up and run the pipeline?

Set up a virtual environment and install dlt:

Copy
uv venv && source .venv/bin/activate
uv pip install "dlt[workspace]"

1. Install the dlt AI Workbench:

Copy
dlt ai init --agent <your-agent> # <agent>: claude | cursor | codex

This installs project rules, a secrets management skill, appropriate ignore files, and configures the dlt MCP server for your agent. Learn more →

2. Install the rest-api-pipeline toolkit:

Copy
dlt ai toolkit rest-api-pipeline install

This loads the skills and context about dlt the agent uses to build the pipeline iteratively, efficiently, and safely. The agent uses MCP tools to inspect credentials — it never needs to read your secrets.toml directly. Learn more →

3. Start LLM-assisted coding:

Use /find-source to load data from the Farcaster API into DuckDB.

The rest-api-pipeline toolkit takes over from here — it reads relevant API documentation, presents you with options for which endpoints to load, and follows a structured workflow to scaffold, debug, and validate the pipeline step by step.

4. Run the pipeline:

Copy
python farcaster_pipeline.py

If everything is configured correctly, you'll see output like this:

Copy
Pipeline farcaster_pipeline load step completed in 0.26 seconds
1 load package(s) were loaded to destination duckdb and into dataset farcaster_data
The duckdb destination used duckdb:/farcaster.duckdb location to store data
Load package 1749667187.541553 is LOADED and contains no failed jobs

Inspect your pipeline and data:

Copy
dlt pipeline farcaster_pipeline show

This opens the Pipeline Dashboard where you can verify pipeline state, load metrics, schema (tables, columns, types), and query the loaded data directly.

---

Python pipeline example

This example loads channels and channel_followers from the Farcaster API into DuckDB. It mirrors the endpoint and data selector configuration from the table above:

Copy
import dlt
from dlt.sources.rest_api import RESTAPIConfig, rest_api_resources

@dlt.source
def farcaster_source(app_key=dlt.secrets.value):
    config: RESTAPIConfig = {
        "client": {
            "base_url": "https://api.farcaster.xyz",
            "auth": {
                "type": "bearer",
                "token": app_key,
            },
        },
        "resources": [
            {"name": "channels", "endpoint": {"path": "v2/all-channels", "data_selector": "result.channels"}},
            {"name": "channel_followers", "endpoint": {"path": "v1/channel-followers", "data_selector": "result.users"}}
        ],
    }
    yield from rest_api_resources(config)


def get_data() -> None:
    pipeline = dlt.pipeline(
        pipeline_name="farcaster_pipeline",
        destination="duckdb",
        dataset_name="farcaster_data",
    )
    load_info = pipeline.run(farcaster_source())
    print(load_info)

To add more endpoints, append entries from the resource table to the "resources" list using the same name, path, and data_selector pattern.

---

How do I query the loaded data?

Once the pipeline runs, dlt creates one table per resource. You can query with Python or SQL.

Python (pandas DataFrame):

Copy
import dlt

data = dlt.pipeline("farcaster_pipeline").dataset()
sessions_df = data.channel_followers.df()
print(sessions_df.head())

SQL (DuckDB example):

Copy
SELECT * FROM farcaster_data.channel_followers LIMIT 10;

In a marimo or Jupyter notebook:

Copy
import dlt

data = dlt.pipeline("farcaster_pipeline").dataset()
data.channel_followers.df().head()

See how to explore your data in marimo Notebooks and how to query your data in Python with dataset.

---

What destinations can I load Farcaster data to?

dlt supports loading into any of these destinations — only the destination parameter changes:

Change the destination in dlt.pipeline(destination="snowflake") and add credentials in .dlt/secrets.toml. See the full destinations list.

---

Next steps

Continue your data engineering journey with the other toolkits of the dltHub AI Workbench:

• data-exploration — Build custom notebooks, charts, and dashboards for deeper analysis with marimo notebooks.
• dlthub-runtime — Deploy, schedule, and monitor your pipeline in production.

Copy
dlt ai toolkit data-exploration install
dlt ai toolkit dlthub-runtime install

• How to deploy a pipeline
• How to explore your data in marimo Notebooks
• How to query your data in Python with dataset
• Join the dlt community on Slack