T3N Sandbox — Get free test credits | Terminal 3

Agent Developer Kit

Free test credits to ship trusted AI agents

The T3N sandbox gives developers everything to build agents with verifiable identity, programmable authorization, and secure payments. Claim 20,000 test credits and start shipping.

20,000 test credits— enough for 25 agents and ~5,000 protected actions.
Full SDK access— npm, MCP server, plus a Stripe-backed test merchant.
One signup, every protocol— A2A, ERC-8004, Entra Agent ID, MCP, Web Bot Auth.

Claim your free test credits

Campaign code (Optional)

Enter hackathon, conference, or partner codes.

By claiming, you agree to the T3 ADK Developer Terms

Drop in beside your agent.

Ship trusted actions.

The T3 ADK wraps every outbound action your agent takes — verifying identity, substituting sensitive references inside a TEE, and writing an audit row to the ledger — before it ever reaches the destination system. Learn more

YOUR AGENT

payroll-agent

MCP host

actionbank.transfer($4,250)

Identity + Action Layer

Ingest private data during runtime
Compute confidentially
Verify results

0x4f…a12c· 23ms ·Signed

DESTINATION

Bank Payments

did:t3n:organization

Account:···· ···· 4827

amount:$4,250.00

One SDK, every protocol (A2A · ERC-8004 · MCP)

Browse on GitHub

Everything you need to build, in one signup.

The T3N sandbox is the full stack — same SDK, same enclaves, same protocol coverage as production. We're just covering your gas.

Test credits, instantly

Enough to register up to 25 agents and run roughly 5,000 protected actions.

Verifiable agent identities

Cryptographically signed, W3C-compliant decentralized identifiers. Resolve to A2A cards, ERC-8004, Entra Agent ID — register once.

Stripetest mode

Agent Connect payments

Real placeholder-resolution flow inside the TEE. Run end-to-end payment intents with test cards — no PCI scope on your side.

Full SDK + MCP

Every integration surface

npm package, MCP server, CLI, REST/SDK, sample apps.

From signup to first protected action in 5 minutes

Authenticate and claim
Sign in with Google and enter an optional campaign code. We’ll instantly provision your T3 decentralized ID (DID) and queue up your test credits.
Receive your credits and DID
Copy your API key directly from the success screen. Your test credits and DID will be assigned automatically to that API key. Note: During the test phase, you will not be able to retrieve your API key after this page, so please make sure to store them somewhere safe before you move on.
Install the SDK and build
npm install, initialize the client, and provide your API key. Set to sandbox — your app can open an authenticated TEE session and deploy your contract in 5 minutes.

import {
  T3nClient, loadWasmComponent, setEnvironment,
  createEthAuthInput, eth_get_address, metamask_sign,
} from "@terminal3/t3n-sdk";

setEnvironment("sandbox");

// your API key
const key = process.env.T3N_API_KEY!;
const address = eth_get_address(key);

const client = new T3nClient({
  // all crypto runs inside WASM
  wasmComponent: await loadWasmComponent(),
  // signs your login challenge
  handlers: { EthSign: metamask_sign(address, undefined, key) },
});

// open an encrypted session in the TEE
await client.handshake();
// prove your wallet → your did:t3n:…
await client.authenticate(createEthAuthInput(address));

// your token balance
const { balance } = await client.getUsage();
console.log(`Credits available: ${balance.available}`);

Real-world use cases. One SDK.

These are the reference agents included with the T3N sandbox. Review the contract and sample call — then start building. You're 30 minutes from a working demo.

Finance · HRIS Payroll Agent✦ Flagship
An agent that reads HR data and triggers bank transfers — without ever holding raw account numbers. The flagship demo for Super AI Week.
Commerce · Stripe E-commerce Procurement
Stripe-backed checkout flow with an agent that picks vendors, places orders, and reconciles invoices on a real merchant account.
Government · KYC E-visa Form Filling
Agent reads applicant identity from a verifiable credential, fills government forms, and submits without exposing passport numbers in the prompt context.
Travel · A2A delegation Travel Booking
Flight + hotel agent that books on the operator's card with a scoped, time-bound spending limit — single-hop delegation via A2A.

FAQs

01 Do I need a campaign code to sign up?

No — the campaign code is entirely optional. It exists for hackathon partners, conferences, and ecosystem programs that might be granting bonus credits. Sign up without one and you still receive the full 20,000 T3N starter allocation.

02 How fast do credits actually arrive?

Sandbox credits will be generated alongside your DID and assigned to your API key once you signed up. Your API key will be immediately visible for saving once you signed up. There will be a rate-limit to one signup per email.

03 What's the difference between T3N sandbox and T3N production?

T3N sandbox has no monetary value and is scoped to non-production environments. Your did:t3n identities, audit ledger entries, and TEE contracts are persistent through sandbox and migrate seamlessly to production at GA — you don't have to rebuild.

04 Can I run real Stripe payments on the T3N sandbox?

Yes — Agent Connect on the T3N sandbox is wired to Stripe test mode. You can run the full placeholder-resolution → TEE-execution → audit-row flow end to end against the Stripe test API, with test card numbers. No PCI scope on your side.

05 Which agent frameworks does the SDK work with?

The SDK and MCP server are framework-agnostic. The MCP server works with anything that speaks the Model Context Protocol — Claude Desktop, Cursor, custom hosts.

06 Is there a limit on how many credits I can request?

You will receive an initial allocation for 20,000 T3N per signup. Do not worry, this amount is more than sufficient for any testing needed. In the situation where more is required, please do not hesitate to email devrel@terminal3.io

07 When does production launch?

We're shipping the dev kit through 2026, with a phased production rollout aligned to APAC regulatory milestones (IMDA, HKMA, MAS). Sandbox builders get pre-GA pricing locked in. Subscribe to product updates and we'll send the GA date directly.

08 How do you handle my data?

Signup data is stored under T3's APAC data residency (SOC 2 controls). Sensitive runtime data — what your agents actually process — never leaves the TEE. We never train models on customer data. Full details in our privacy policy.