monapi
One-line x402 paywall SDK for monetizing APIs and MCP servers with per-route USDC pricing.
Last commit Mar 23, 2026
Overview
monapi wraps x402 paywall setup for Express, Next.js, and MCP servers so a developer can gate a route behind a per-request USDC price with a single function call. Agent builders use it to charge other agents for API access (or to pay for access themselves) without building custom billing, key management, or signup flows — payment terms are embedded in HTTP 402 responses and settled on Base, Arbitrum, or Polygon testnets/mainnet via EIP-3009.
Sato Score
52/100· MediumHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 20/35
- Code transparency
- 16/20
- Interface verifiability
- 0/10
- Docs & demo
- 6/10
- 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%.
Details
- Chains
- Base, Arbitrum, Polygon
- Agent types
- SDK / payment middleware
- 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.
Listing History
Recorded changes to monapi's listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.
- Jul 20, 2026Edited: deploy spec
- Jul 19, 2026Listed on Sato Hub
- Jul 19, 2026Sato Hub began tracking this listing
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Sato Hub. "monapi — Sato Hub." Sato Hub, updated 2026-09-05, accessed 2026-09-05. https://satohub.ai/resources/monapiThis page is refreshed daily. Citations include the date so a reader can tell which snapshot a claim came from.
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