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Announcing the Coinbase Developer Sandbox

Feb 26, 2015 • Lezen duurt 1 minuten

We’re excited to announce the launch of Coinbase Sandbox, a dedicated test environment where merchants and developers can easily and safely test bitcoin functionality.

The Coinbase Sandbox runs on testnet3, an alternate blockchain specifically designed for testing Bitcoin functionality. It does not require the use of live Coinbase accounts or real bitcoin. Testnet bitcoin have no monetary value and are used for testing purposes only.

The Coinbase Sandbox API looks, feels, and behaves just like the actual Coinbase API, delivering an accurate and representative test environment. For more detailed information about Sandbox functionality, please visit our developer blog.

To get started, simply sign up for a Coinbase Sandbox account account and begin testing.

Recente verhalen

Part 3/3 Owning Intelligence Series: How Coinbase Built, Evaluated, and Post-Trained a Fraud Agent

Yao Ma, Xuwei Tan, Akshit Trehan, Aman Choudhary, Anyscale Team: Eric Tang, Sumanth Hegde, Seiji Eicher, Jess Kong

Oct 8, 2026

TL;DR: Using SkyRL on Anyscale, we post-trained Qwen3.5-9B for Onramp fraud detection and served it with Ray Serve LLM and vLLM. On our benchmark, it exceeded Opus 4.5 across all four detection metrics, including 9.6% higher F1. In online inference, we reduced end to end latency by 55%.

Engineering

Part 2/3 Owning Intelligence Series: How Coinbase Built, Evaluated, and Post-Trained a Fraud Agent

Yao Ma, Xuwei Tan

Oct 7, 2026

TL;DR: Newer LLMs are not necessarily better at domain-specific tasks. On our fraud benchmark, newer Opus, Sonnet, and GPT versions all had lower recall, F1, and dollar-weighted recall—even when precision improved. The lesson: choose models using high-quality, domain-specific benchmarks, with reproducible evaluation and ideally deterministic scoring against verified outcomes. These findings also motivated our next step: post-training open-weight models for greater control over quality, cost, and deployment.

Engineering

Migrating 300+ namespaces from self-hosted Temporal to Temporal Cloud

Ian Yap

Oct 1, 2026

TL;DR: We moved more than 300 Temporal namespaces, across more than 300 services, from a cluster we ran ourselves onto Temporal Cloud. You cannot finish the move by repointing services at Temporal Cloud while workflows are still running on the old one. Where teams could pause new work, we waited for in-flight runs to finish and then switched; for trading, payments, and long-running work, we ran the old cluster and Temporal Cloud, and moved new workflows over in steps, with rollback as a config change. Private connectivity, per-namespace service allowlists, and encrypted payloads were in place before the first production namespace moved.

Engineering

Disclaimers: Derivatenhandel via het Coinbase Advanced-platform wordt aangeboden aan in aanmerking komende klanten uit de EER door Coinbase Financial Services Europe Ltd. (CySEC-licentie 374/19). Om toegang te krijgen tot derivaten, zullen klanten onze standaard beoordelingscontroles moeten doorlopen waarmee we bepalen of u in aanmerking komt voor dit product en ervoor geschikt bent.

Announcing the Coinbase Developer Sandbox

Recente verhalen

Part 3/3 Owning Intelligence Series: How Coinbase Built, Evaluated, and Post-Trained a Fraud Agent

Coinbase and Samsung Bring USDC to Samsung Wallet

Part 2/3 Owning Intelligence Series: How Coinbase Built, Evaluated, and Post-Trained a Fraud Agent

Coinbase bouwt het meest complete handelsplatform ooit

Part 1/3 Owning Intelligence Series: How Coinbase Built, Evaluated, and Post-Trained a Fraud Agent

Migrating 300+ namespaces from self-hosted Temporal to Temporal Cloud