The easiest way to move money with your AI agent. Built for TypeScript developers who want power, safety, and speed.

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Quick Install

npm install @paymanai/payman-ts
Node.js 20+ is required for full compatibility.

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Environment Setup

Before you start, add your credentials to a .env file in your project root:

PAYMAN_CLIENT_ID=your-client-id
PAYMAN_CLIENT_SECRET=your-client-secret
Get these from your Payman dashboard after registering an app.

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Authentication & Initialization

You can initialize the client in several ways, depending on your use case:

import { PaymanClient } from "@paymanai/payman-ts";

const payman = PaymanClient.withCredentials({
	clientId: process.env.PAYMAN_CLIENT_ID!,
	clientSecret: process.env.PAYMAN_CLIENT_SECRET!,
	name: "my-client", // optional
	sessionId: "ses-abc", // optional
});

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OAuth Authorization Code

const payman = PaymanClient.withAuthCode(
	{
		clientId: "your-client-id",
		clientSecret: "your-client-secret",
	},
	"your-auth-code"
);

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Access Token or Refresh Token

const payman = PaymanClient.withToken(
	{
		clientId: "your-client-id",
	},
	{
		accessToken: "your-access-token",
		expiresIn: 3600,
		refreshToken: "your-refresh-token",
	}
);

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Making Requests

Ask questions, send money, or trigger actions—all in one line.

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Formatted Response (default)

const response = await payman.ask("How much money do I have in my wallet?");
console.log(response);

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Raw JSON Response

const raw = await payman.ask("How much money do I have in my wallet?", {
	outputFormat: "json",
});
console.log(raw);

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Streaming Responses

await payman.ask("List all payees", {
	onMessage: (msg) => console.log("Live:", msg),
	outputFormat: "markdown",
});

Use onMessage for real-time updates, long-running tasks, or progress monitoring. Streaming is ideal for workflows where you want to process results as they arrive.

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Metadata

Attach metadata to requests for extra context and control over how your requests are processed:

await payman.ask("Pay Tyllen $50?", {
	metadata: { source: "mobile-app", userId: "user123" },
	messageMetadata: { priority: "high" },
	partMetadata: { currency: "USD" },
});

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Session Management

Sessions allow you to maintain context across multiple requests. Each client instance manages its own session by default, so you can have ongoing conversations or workflows that remember previous actions.

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How Sessions Work

  • Every time you create a client, a new session is started unless you provide a sessionId.
  • The session ID is included in every response from payman.ask().
  • You can use this session ID to resume a conversation or workflow at any time, even across different client instances or after a restart.

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Resuming a Session

To resume a previous session, pass the sessionId when initializing the client:

// Start a conversation
const first = await payman.ask("How much money do I have?");
const sessionId = first.sessionId; // Save this for later

// Resume the conversation with a new client instance
const payman2 = PaymanClient.withCredentials({
	clientId: "your-client-id",
	clientSecret: "your-client-secret",
	sessionId,
});
const response2 = await payman2.ask("What did we talk about earlier?");

You can also resume with the withToken method:

const payman3 = PaymanClient.withToken(
	{
		clientId: "your-client-id",
		sessionId: sessionId,
	},
	{
		accessToken: "your-access-token",
		expiresIn: 3600,
	}
);

To get the current session ID from any client instance:

const currentSessionId = payman.getSessionId();

Session management is essential for building conversational agents, multi-step workflows, or any scenario where you want to maintain state across requests.

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Token Management

Tokens are fetched and refreshed automatically. You can also access them directly if needed:

const tokenInfo = await payman.getAccessToken();
const refreshToken = payman.getRefreshToken();

Tokens refresh automatically before they expire. If you provide a refresh token, the SDK will use it as needed.

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Error Handling

All API calls throw if something goes wrong. Catch and inspect errors as needed:

try {
	const res = await payman.ask("What's my balance?");
} catch (error: any) {
	if (error.response) {
		console.error(error.response.data);
	} else {
		console.error(error.message);
	}
}

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API Reference (At a Glance)

Static Methods

  • withCredentials(config)
  • withAuthCode(config, code)
  • withToken(config, tokenInfo)

Instance Methods

  • ask(text, options?)
  • getAccessToken()
  • getRefreshToken()
  • isAccessTokenExpired()
  • getSessionId()
  • getClientName()

Need help? Email us at support@paymanai.com