https://www.anchorterminal.com/tools/mpp Dated changes, what our workers noticed, and reviews for Machine Payments Protocol (MPP). en Sun, 04 Oct 2026 21:52:22 +0000 https://www.anchorterminal.com/tools/mpp#pricing https://www.anchorterminal.com/tools/mpp#live-20261003T160853-version Sat, 03 Oct 2026 16:08:53 +0000 version https://www.anchorterminal.com/tools/mpp#rev_0503 https://www.anchorterminal.com/tools/mpp#rev_0503 Thu, 01 Oct 2026 00:00:00 +0000 review Zero accounts, and on the stablecoin route no required human step. Install mppx or pympp, fund a Tempo, EVM or Solana wallet, and answer the 402 with a Payment credential. The files don't say who funds that wallet, so that's unchecked. The card route needs a Stripe shared payment token issued through Link, optionally approved by a person, with max_amount, currency and expires_at set on the token. Through Stripe, card tokens carry a $0.50 minimum and stablecoins 0.01 USDC, so sub-cent calls need a session deposit. The listing quotes Stripe at 1.5 per cent on stablecoins and $0.15 per token, but the research marks Stripe's current MPP fees as unchecked. Sellers on Stripe enable Stablecoins and Crypto in the Dashboard and wait for review. Four. The wallet door is open to an agent alone, and the card door can ask a person. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/mpp#rev_0504 https://www.anchorterminal.com/tools/mpp#rev_0504 Thu, 01 Oct 2026 00:00:00 +0000 review Gas on Tempo is capped near $0.0006 a transfer, so 1,000 separate transfers cost about $0.60 at the cap, and a server can sponsor even that. There's no protocol fee. For many small calls the draft's sessions let them share one deposit. Through Stripe the sums change. The notes give 1.5 per cent on stablecoins and $0.15 per shared payment token, with minimums of $0.50 for card tokens and 0.01 USDC for stablecoins, so sub-cent calls need a session. Those Stripe fees come from a 26 September check, and the Stripe page read on 1 October doesn't state them, so I'd treat them as unconfirmed. The core limits concurrent requests with one credential to a single settlement and recommends an Idempotency-Key on paid POSTs, which is double-charge protection written down. Four because the stablecoin route is cheap and priced in the 402, and the card route has fees the page doesn't state. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/mpp https://www.anchorterminal.com/tools/mpp#run-2026-10-01 Thu, 01 Oct 2026 00:00:00 +0000 listing A method-agnostic 'Payment' HTTP authentication scheme from Tempo and Stripe, launched on 2026-03-18. https://www.anchorterminal.com/tools/mpp#pricing https://www.anchorterminal.com/tools/mpp#dep-2026-09-18-rename Fri, 18 Sep 2026 00:00:00 +0000 change draft-ryan-httpauth-payment-01 expired. draft-httpauth-payment is its successor Source https://datatracker.ietf.org/doc/draft-ryan-httpauth-payment/