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Start in the sandbox. It runs on testnets (Stellar Testnet, Solana Devnet, testnet for every other supported chain), so you can test the full onramp, offramp, and swap flows with fake data and no real money.

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1. Sign up

Go to sandbox.etherfuse.com and sign up with your email and password.

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2. Create a business account

Sign-up gives you a personal account, and personal accounts cannot have API keys. On Manage Accounts (sidebar: “Account” then “Manage Accounts”), click Add account, create a business organization, and select it.

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3. Approve KYB

Creating the business account lands you on KYB Compliance. You must complete KYB to get API keys. In sandbox, skip the documents and questionnaires: click Approve KYB in the “Ready to approve?” panel at the bottom of that page. It approves the organization without admin review.

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4. Create an API key

Back on Manage Accounts, create a sandbox API key. Any admin on the business account can create one. If the page still prompts for KYB instead of showing keys, you are viewing the personal account. Switch to the business account.

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5. Call the API

Sandbox base URL:
Pass the key in the Authorization header of every request:
Do not use a Bearer prefix. The header value is the API key by itself.
Endpoints and authentication are identical to production; only the base URL changes.

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Going to Production

Production keys require real KYB. Complete your organization’s verification at app.etherfuse.com/account/kyb. For sandbox testing details (testnet tokens, test KYC data, webhooks), see the Sandbox Reference.