Observed Signal · Jun 30, 2026 · Technical Release · Source: DEV Community · Impact: 1/5 · Sentiment: Neutral
Shieldz crypto payment API: 10-minute quickstart
This article is a concise 10-minute quickstart for the Shieldz non-custodial crypto payment API. It explains three integration steps: obtain a secret API key (sk_live_… or sk_test_…), create an invoice with a required amount_usd_cents, redirect customers to Shieldz’s hosted checkout (pay_url) which accepts multiple coins and sends funds directly to the merchant’s wallet, and verify Shieldz’s signed invoice.paid webhook using an HMAC-SHA256 signature in the X-Shieldz-Signature header. The post highlights that Shieldz never takes custody of funds, advertises $0 platform fees, recommends testing with sk_test_ keys and the dashboard simulator, and notes official SDKs for Node, Python, Rust and PHP plus a hosted MCP server for AI agent integrations. Publication date: 2026-06-30.
A vendor technical quickstart for a payment API is practically useful to developers and merchants but is narrowly scoped and not industry-shifting for AdTech/MarTech.
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Key Takeaways & Evidence Grounding
- Shieldz provides a non-custodial crypto payment API where funds settle directly to the merchant’s wallet and Shieldz does not hold customers’ money.
- Integration steps: create a secret key (sk_live_… or sk_test_…), create an invoice (amount_usd_cents required), redirect to the hosted checkout (pay_url), and verify the signed invoice.paid webhook.
- Webhook signature is sent in the X-Shieldz-Signature header with format t=<unix>,v1=<hex> where v1 = HMAC_SHA256(secret, "<t>.<rawBody>").
- Shieldz’s hosted checkout accepts BTC, ETH, USDC, USDT, Zcash and more; merchants settle to a single chosen token.
- Official SDKs are available for Node, Python, Rust and PHP and Shieldz offers a hosted MCP server for agent-created payment links; the post claims $0 platform fees.
Ontology Mapping & Concepts
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