The official python client for the connected papers API.

pip install connectedpapers-py

from connectedpapers import ConnectedPapersClient

DEEPFRUITS_PAPER_ID = "9397e7acd062245d37350f5c05faf56e9cfae0d6"

# TEST_TOKEN allows access ONLY to the paper with the id DEEPFRUITS_PAPER_ID
client = ConnectedPapersClient(access_token="TEST_TOKEN")
remaining_uses_count = client.get_remaining_usages_sync()
print(f"Remaining uses count: {remaining_uses_count}")
free_access_papers = client.get_free_access_papers_sync()
print(f"Free access papers: {free_access_papers}")
graph = client.get_graph_sync(DEEPFRUITS_PAPER_ID)
assert graph.graph_json.start_id == DEEPFRUITS_PAPER_ID

See more on the usage samples directory.

See graph structure at graph.py.

There are multiple ways to configure the server address and API key:

1. Set the environment variable CONNECTED_PAPERS_API_KEY:

   export CONNECTED_PAPERS_API_KEY="YOUR_API_KEY"

   Then you can use the client without parameters:

    from connectedpapers import ConnectedPapersClient
   
    client = ConnectedPapersClient()

2. Send parameters to the client's constructur:

   from connectedpapers import ConnectedPapersClient
   
   client = ConnectedPapersClient(access_token="YOUR_API_KEY")

Contact us at hello@connectedpapers.com to get an early-access access token.

Using the token TEST_TOKEN or not passing a token at all, will allow you to access the graph of the paper with the id 9397e7acd062245d37350f5c05faf56e9cfae0d6 for testing purposes.

We use the ShaIDs from Semantic Scholar as paper IDs. You can find the ShaID of a paper by searching for it on Semantic Scholar and copying the ID from the URL.

Most functions offer a synchronous and an asynchronous version.

If a graph is already built, you can get it within a standard API call latency. If it is outdated (older than 1 month), you can still get it using the fresh_only=False parameter. If you wait for a rebuild (either fresh_only=True and graph older than 30 days, or no graph built for the paper) a rebuild will be triggered; A graph build can take up to 1 minute, and usually around 10 seconds.

The graph structure is documented at graph.py.

We have the following API calls available:

• Fetching a graph
• Getting the remaining usages count for your API key
• Getting the list of papers that are free to access

If you have fetched a paper, it remains free to access for a month after the first access without counting towards your usages count.

from connectedpapers import ConnectedPapersClient

client = ConnectedPapersClient(access_token="YOUR_API_KEY")
client.get_graph_sync("YOUR_PAPER_ID")  # Fetch a graph for a single paper
client.get_remaining_usages_sync()  # Get the remaining usages count for your API key
client.get_free_access_papers_sync()  # Get the list of papers that are free to access

from connectedpapers import ConnectedPapersClient

client = ConnectedPapersClient(access_token="YOUR_API_KEY")


async def usage_sample() -> None:
   await client.get_graph_async("YOUR_PAPER_ID")  # Fetch a graph for a single paper
   await client.get_remaining_usages_async()  # Get the remaining usages count for your API key
   await client.get_free_access_papers_async()  # Get the list of papers that are free to access

usage_sample()

The client offers support for Python's asynchronous iterator access to the API, allowing for real-time monitoring of the progress of graph builds and retrieval of both current and rebuilt papers.

The method get_graph_async_iterator returns an asynchronous iterator, generating values of the GraphResponse type. Here's what the GraphResponse and related GraphResponseStatuses looks like in Python:

class GraphResponseStatuses(Enum):
    BAD_ID = "BAD_ID"
    ERROR = "ERROR"
    NOT_IN_DB = "NOT_IN_DB"
    OLD_GRAPH = "OLD_GRAPH"
    FRESH_GRAPH = "FRESH_GRAPH"
    IN_PROGRESS = "IN_PROGRESS"
    QUEUED = "QUEUED"
    BAD_TOKEN = "BAD_TOKEN"
    BAD_REQUEST = "BAD_REQUEST"
    OUT_OF_REQUESTS = "OUT_OF_REQUESTS"


@dataclasses.dataclass
class GraphResponse:
    status: GraphResponseStatuses
    graph_json: Optional[Graph] = None
    progress: Optional[float] = None
    remaining_requests: Optional[int] = None

Once the status falls into one of the terminal states (BAD_ID, ERROR, NOT_IN_DB, BAD_TOKEN, BAD_REQUEST, OUT_OF_REQUESTS), the iterator will cease to yield further values.

Here's the signature for invoking this method:

class ConnectedPapersClient:
    # ...
    async def get_graph_async_iterator(
        self, paper_id: str, fresh_only: bool = False, loop_until_fresh: bool = True
    ) -> AsyncIterator[GraphResponse]:
        # ...

Call this method with fresh_only=False and loop_until_fresh=True to request the existing graph and continue waiting for a rebuild if necessary.

The initial response will contain the status GraphResponseStatuses.OLD_GRAPH, then transition through GraphResponseStatuses.QUEUED and GraphResponseStatuses.IN_PROGRESS, with the progress field reflecting the percentage of the graph build completed. Upon completion of the rebuild, the status will change to GraphResponseStatuses.FRESH_GRAPH, and the iteration will end.

The graph_json field will contain the graph corresponding to each of these responses, and will remain a non-None as long as there is any version of the graph available.