> For the complete documentation index, see [llms.txt](https://docs.otherside.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.otherside.xyz/odk-docs/otherside-agentic-api/example-code.md).

# Example Code

## JavaScript: Generic paid endpoint helper

```ts
async function callPaidEndpoint(url: string, init?: RequestInit) {
  const first = await fetch(url, init)
  if (first.status !== 402) return first

  const challengeHeader = first.headers.get("PAYMENT-REQUIRED")
  if (!challengeHeader) {
    throw new Error("Missing PAYMENT-REQUIRED header on 402 response")
  }

  const paymentRequired = JSON.parse(
    Buffer.from(challengeHeader, "base64").toString("utf8"),
  )

  // Build/sign this payload with your wallet stack (EIP-3009 transferWithAuthorization)
  const paymentPayload = await buildAndSignX402Payload(paymentRequired)
  const paymentSignature = Buffer.from(
    JSON.stringify(paymentPayload),
    "utf8",
  ).toString("base64")

  return fetch(url, {
    ...init,
    headers: {
      ...(init?.headers ?? {}),
      "PAYMENT-SIGNATURE": paymentSignature,
    },
  })
}
```

## JavaScript: wallet -> privy-id -> user-data -> chat

```ts
const BASE_URL = "https://otherside.xyz"

export async function fetchUserChatFromWallet(wallet: string) {
  // 1) wallet -> privyId
  const privyResp = await callPaidEndpoint(
    `${BASE_URL}/api/agents/privy-id?wallet=${encodeURIComponent(wallet)}`,
  )
  if (!privyResp.ok) throw new Error(`privy-id failed: ${privyResp.status}`)
  const privyJson = await privyResp.json()
  const privyId = String(privyJson.privyId)

  // 2) privyId -> user-data
  const userId = `did:privy:${privyId}`
  const userDataResp = await callPaidEndpoint(
    `${BASE_URL}/api/agents/user-data?userId=${encodeURIComponent(userId)}`,
  )
  if (!userDataResp.ok) {
    throw new Error(`user-data failed: ${userDataResp.status}`)
  }
  const userDataJson = await userDataResp.json()
  const worldId = userDataJson?.data?.worldId
  if (!worldId) throw new Error("No worldId found in user data")

  // 3) worldId -> chat
  const chatResp = await callPaidEndpoint(
    `${BASE_URL}/api/agents/chat?worldId=${encodeURIComponent(worldId)}&page=1&limit=20`,
  )
  if (!chatResp.ok) throw new Error(`chat failed: ${chatResp.status}`)
  return chatResp.json()
}
```

## cURL: chat by world alias

```bash
curl -i "https://otherside.xyz/api/agents/chat?world=SWAMP&page=1&limit=20"
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.otherside.xyz/odk-docs/otherside-agentic-api/example-code.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.