monapi
One-line x402 paywall SDK for monetizing APIs and MCP servers with per-route USDC pricing.
- Sato Score53
- ChainsBase, Arbitrum +1
monapi is an open-source payment rail on Base, Arbitrum and Polygon, with last code activity on 2026-03-24 (Quiet). Sato Score 53/100 (how open, active and verifiable it is, not a safety grade), as of 2026-10-21. How the score works →
See how to install monapi →Last commit Mar 24, 2026 · ★ 4
Listed from monapi.dev on 2026-07-19. Install: not attempted. Evidence →
Next step
Watch monapi
One email if what we observe changes — its repo goes quiet or disappears, or the listing is retired. Nothing else.
Check it from your agent
Add Sato Hub’s MCP server (no key), then ask:
https://satohub.ai/api/mcpRun Sato Hub Preflight on denisthem/monapi before I use it.Your project?
Prove you control the domain and correct this page — description, links, tags, chains. A claim proves control, not verification: it never changes the Sato Score.
Claim this listing →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
53/100· MediumHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 20/35
- Code transparency
- 17/20
- Interface verifiability
- 0/10
- Docs & demo
- 6/10
- Listing transparency & provenance
- 7/15
- Independent verification
- 3/10
Sato Check
v2.28.0 · as of 2026-09-30- Does it take your key?
- No key read found
- Does your key leave?
- Not yet run
- Can it move funds on its own?
- Unknown
A profile describes what we read and ran, with dates. It is not a safety rating, an audit or an endorsement, and "not found" is not "not there".
Evidence — listed vs checked · what the words mean
Listed from monapi.dev on 2026-07-19. Install: not attempted.
| Claim | Value | Evidence | Source | Checked |
|---|---|---|---|---|
| Chains supported | Base, Arbitrum, Polygon | self-reported | github.com/DenisTheM/monapi | as of 2026-10-21 |
| Verification status | Unverified — not independently reviewed | self-reported | monapi.dev | as of 2026-10-21 |
| Recent activity | last commit 2026-03-24 | observed | github.com/DenisTheM/monapi | 2026-10-21 |
| Install works | documented by the project, not run by Sato Hubnot attempted: no falsifiable install+entry probe from deploy_spec | self-reported | raw.githubusercontent.com | as of 2026-09-14 |
| Website answers | answered (HTTP 307) | observed | monapi.dev | 2026-10-21 |
| Daily check record | 90 of 90 daily checks since 2026-07-23 succeededa success rate of our checks, not uptime; the source is this listing's own history | observed | — | 2026-10-20 |
| Takes your key | no private-key read found in what we read | traced | satohub.ai | 2026-09-30 |
| Key leaves the machine | not yet run with planted test keysthe sandbox lane has not run on this version | observed | satohub.ai | not dated |
| Moves funds on its own | unknown — could not read what it exposes | traced | satohub.ai | 2026-09-30 |
| Sato Score | 53/100 (Medium)how open, active and verifiable — not a safety or quality grade | computed | satohub.ai | 2026-10-21 |
Self-reported rows are the project’s own words, dated when we recorded them — not a check. Only reproduced and reviewed rows carry a mark. None of these rows is a safety or quality rating.
Install — not run by us — no falsifiable install+entry probe from deploy_spec
Runtime: Node.js >=18 (npm package; x402 payment middleware for Express 4+/Next.js 13+/MCP SDK 1+)
npm install @monapi/sdk @x402/express
npm install @monapi/sdk @x402/next
npm install @monapi/sdk @x402/mcp
import { monapi } from "@monapi/sdk"; app.use(monapi({ wallet: "0xYourWalletAddress", price: 0.01 }));You supply: MONAPI_WALLET — EVM wallet address that receives payments (public address, not a secret)
Read from the project’s own docs as of 2026-09-14. What a deploy spec is →
Observed record — 91 daily checks since 2026-07-23
- Succeeded
- 91
- 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. 40 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. Every one of them passed, so the rate covers them too.
Last 30 days — to 2026-10-21, one point per UTC day
A gap is a day we have no attributable observation — never a zero. Thirty points is the whole shape the free layer carries; the daily rows behind it stay in the snapshot series.
Details
- Chains
- Base, Arbitrum, Polygon
- Agent types
- SDK / payment middleware
- Open source
- Yes
- Last checked
- 2026-10-21
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.
- Sep 26, 2026Edited: entity class, resource type
- Jul 24, 2026Sato Hub began tracking this listing
- Jul 20, 2026Edited: deploy spec
- Jul 19, 2026Listed on Sato Hub
Compared with
Appears in
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Reference
QuestionsWhat people ask about this pageShowHide
Questions people ask about monapi
- Is monapi open source?
- Yes. monapi is open source under the MIT license; the repository is https://github.com/DenisTheM/monapi. Checked as of 2026-10-21.
- Which chains does monapi support?
- monapi lists support for Base, Arbitrum, Polygon as of 2026-10-21.
- Is monapi still maintained?
- The most recent code activity Sato Hub observed was on 2026-03-24 (last commit 2026-03-24), which Sato Hub labels "Quiet". Posts on X are not counted as maintenance. Activity is a recency signal, not a quality judgment.
- How do I install or run monapi?
- Node.js >=18 (npm package; x402 payment middleware for Express 4+/Next.js 13+/MCP SDK 1+). Install: npm install @monapi/sdk @x402/express && npm install @monapi/sdk @x402/next && npm install @monapi/sdk @x402/mcp. Entry: import { monapi } from "@monapi/sdk"; app.use(monapi({ wallet: "0xYourWalletAddress", price: 0.01 }));. This is taken from the project's own documentation and has not been reproduced by Sato Hub.
- Is monapi verified on Sato Hub?
- No independent verification is on record for monapi; its verification status is "Unverified" and its Sato Score is 53 of 100. Self-reported is not verified, and the score is not a safety, quality or returns grade.
Cite this pagePlain text, APA or BibTeXShowHide
Cite this page
Sato Hub. "monapi — Sato Hub." Sato Hub, updated 2026-10-21, accessed 2026-10-21. https://satohub.ai/resources/monapiData last refreshed 2026-10-21; this page is rebuilt daily. Citations carry the date so a reader can tell which snapshot a claim came from. Catalog data is licensed CC-BY-4.0.
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