# Querying Indexer Provider

An indexer node can be queried over HTTP or libp2p for a multihash or a payload CID.

### Using payload CID

#### GET request

```
GET /cid/<cid>
```

#### Curl request

```
curl  https://<INDEXER NODE ADDRESS>/cid/<payload CID>
```

{% code overflow="wrap" %}

```
curl https://cid.contact/cid/bafybeigvgzoolc3drupxhlevdp2ugqcrbcsqfmcek2zxiw5wctk3xjpjwy
```

{% endcode %}

### Query using the multihash

#### GET request

```
GET /mh/<multihash
```

#### Curl request

```
curl  https://<INDEXER NODE ADDRESS>/mh/<multihash>
```

```
curl https://cid.contact/multihash/QmcgwdNjFQVhKt6aWWtSPgdLbNvULRoFMU6CCYwHsN3EEH
```

#### POST Request

```
POST /mh
```

The body for the POST request can be found [here](https://github.com/filecoin-project/storetheindex/blob/f824c7f1f08c606bdc069e9454dfcf157680841e/api/v0/finder/model/model.go#L14-L16) as a JSON.

### Find command

Both [`storetheindex`](https://github.com/filecoin-project/storetheindex) as well as [`index-provider`](https://github.com/filecoin-project/index-provider) binaries contain a `find` command that can be used to query the indexer nodes for a multihash or a payload CID.

```
provider find --help
```

```
storetheindex find --help
```

### Go client library

The [storetheindex](https://github.com/filecoin-project/storetheindex) repo also ships a client library that can be integrated in other programs to query the indexer nodes. The [client library](https://github.com/filecoin-project/storetheindex/tree/main/api/v0/finder/client) can be used to query the indexer nodes over **`HTTP`** as well as **`libp2p`** connections.&#x20;

This client library is also utilised by the `find` command in the `storetheindex` as well as `index-provider` binaries. Programmers can use these commands as reference implementations.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.cid.contact/query-and-retrieve/querying-indexer-provider.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.