Tempo MPP Specs
Specification for the Payment HTTP auth scheme (Multi-Party Payments) from Tempo, the Stripe/Paradigm-backed payments L1.
Last release Sep 3, 2026 · Last commit Aug 25, 2026 · ★ 91
Overview
This repo publishes the specification for Tempo's Machine Payments Protocol, an HTTP 'Payment' authentication scheme for machine-to-machine payments, positioned alongside x402 as an emerging standard some agent-payment SDKs are starting to implement. It's a specs repo, not a runnable library — builders use it as a reference when implementing MPP support. 85 GitHub stars, active.
Sato Score
63/100· MediumHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 35/35
- Code transparency
- 18/20
- Interface verifiability
- 0/10
- Docs & demo
- 0/10
- Listing transparency & provenance
- 7/15
- Independent verification
- 3/10
Observed record — 49 daily checks since 2026-07-19
- Succeeded
- 49
- Failed
- 0
- Their error
- 0
- Unattributed
- 0
This is the share of our daily checks that succeeded — not an availability guarantee. A check can fail because the host was down, because our runner timed out, or because the network in between dropped it, and only the first of those is a fact about this project. Failures are split by what we can attribute; anything we cannot attribute is counted, not hidden. 44 of these checks predate 2026-09-01, when the probe counted a bot-block (HTTP 403) as a failure and recorded no reason for any failure. Rates spanning that date mix two definitions. Since then: 100%.
Measured on-chain — week 2026-W36
What we can observe about this project on-chain, from public reads, with the method and sample size attached to every figure. A raw deployment count is not an adoption figure and is shown separately below.
Rates on fewer than 20 observations are shown but not quotable. Full venue detail: tempo_mpp · The onchain agent economy.
Details
- Chains
- Multichain
- Agent types
- Payment protocol specification
- Open source
- Yes
- Last checked
- 2026-09-05
Marketplace Signals
No marketplace signals recorded for this resource yet.
Verification status reflects evidence reviewed by Sato Hub. Self-reported claims are never presented as verified.
Where Tempo MPP Specs fits
Related concepts: How Agents Use Wallets, What Are Onchain Agents?
Recent Activity
All news →Releases and posts from Tempo MPP Specs, pulled from its GitHub and X.
mpp-specs Latest spec artifacts
Auto-published spec build artifacts from commit 604e0ad . Contains HTML, TXT, XML, and PDF renderings of all IETF Payment Auth specifications.
mpp-specs Latest spec artifacts
Auto-published spec build artifacts from commit 35d60ec . Contains HTML, TXT, XML, and PDF renderings of all IETF Payment Auth specifications.
mpp-specs Latest spec artifacts
Auto-published spec build artifacts from commit 374ba4d . Contains HTML, TXT, XML, and PDF renderings of all IETF Payment Auth specifications.
mpp-specs Latest spec artifacts
Auto-published spec build artifacts from commit a7f86f6 . Contains HTML, TXT, XML, and PDF renderings of all IETF Payment Auth specifications.
mpp-specs Spec preview for PR #328
Auto-generated spec preview assets for PR #328 .
mpp-specs pr-325-spec-preview
fix(tempo-charge): align the EIP-712 Proof contract with shipped v3 (…
Listing History
Recorded changes to Tempo MPP Specs's listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.
- Sep 3, 2026New release published
- Sep 2, 2026New release published
- Aug 8, 2026Auto-enriched: creator name
- Jul 21, 202613 releases trackedShowing the 2 most recent. Full release history is retained in the listing record.
- Jul 19, 2026Edited: chains supported
- Jul 19, 2026Listed on Sato Hub
- Jul 19, 2026Sato Hub began tracking this listing
Related Resources
ERC-8004: Trustless Agents
ActiveEthereum standard providing on-chain identity, reputation, and validation registries for AI agents.
x402
EarlyOpen payment protocol enabling agents and apps to pay for APIs over HTTP using stablecoins.
Agent Payments Protocol (AP2)
ActiveOpen protocol from Google for secure agent-led payments across traditional and crypto rails, with a crypto-native x402 extension built with Coinbase, Ethereum Foundation, and MetaMask.
Is this your project?
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Sato Hub. "Tempo MPP Specs — Sato Hub." Sato Hub, updated 2026-09-05, accessed 2026-09-05. https://satohub.ai/resources/tempo-mpp-specsThis page is refreshed daily. Citations include the date so a reader can tell which snapshot a claim came from.
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