Fewsats
L402 payments platform and MCP server letting agents pay for API access with Bitcoin Lightning or stablecoins.
- Sato Score43
- ChainsBitcoin, Multichain
Fewsats is a partly open-source payment rail on Bitcoin, with last code activity on 2025-05-27 (Dormant). Sato Score 43/100 (how open, active and verifiable it is, not a safety grade), as of 2026-10-21. How the score works →
See how to install Fewsats →Last commit May 27, 2025 · ★ 21
Listed from fewsats.com on 2026-07-19. Install: not attempted. Evidence →
Next step
Watch Fewsats
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 fewsats/fewsats-mcp 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
Fewsats implements the L402 protocol (macaroon-based HTTP 402 payments) so an agent can pay per-request for API access using Bitcoin Lightning or stablecoins, with an MCP server and a companion Python client library (L402-python). 21 GitHub stars; the MCP repo's last commit was May 2025, so treat it as a slower-moving integration layer rather than a frequently-updated one.
Sato Score
43/100· MediumHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 20/35
- Code transparency
- 14/20
- Interface verifiability
- 0/10
- Docs & demo
- 0/10
- Listing transparency & provenance
- 6/15
- Independent verification
- 3/10
Sato Check
v0.1.7 · as of 2026-09-29- 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 fewsats.com on 2026-07-19. Install: not attempted.
| Claim | Value | Evidence | Source | Checked |
|---|---|---|---|---|
| Chains supported | Bitcoin, Multichain | self-reported | fewsats.com | as of 2026-10-21 |
| Verification status | Unverified — not independently reviewed | self-reported | fewsats.com | as of 2026-10-21 |
| Recent activity | last commit 2025-05-27 | observed | github.com/Fewsats/fewsats-mcp | 2026-10-21 |
| Install works | documented by the project, not run by Sato Hubnot attempted: the run did not complete and the log named no cause we could attribute | self-reported | github.com/Fewsats/fewsats-mcp | as of 2026-10-19 |
| Website answers | answered (HTTP 308) | observed | fewsats.com | 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 | 2026-09-29 |
| 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 | 2026-09-29 |
| Sato Score | 43/100 (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 — the run did not complete and the log named no cause we could attribute
Runtime: Python (uvx recommended, pip supported)
uvx fewsats-mcp
{"mcpServers":{"Fewsats Server":{"command":"uvx","args":["fewsats-mcp"],"env":{"FEWSATS_API_KEY":"YOUR_FEWSATS_API_KEY"}}}}You supply: FEWSATS_API_KEY (required — from fewsats.com; grants payment authority over the Fewsats wallet)
MCP invocation: uvx fewsats-mcp (stdio); pip alternative: `pip install fewsats-mcp` then `fewsats-mcp`
Read from the project’s own docs as of 2026-10-19. 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
- Bitcoin, Multichain
- Agent types
- Payments infrastructure (MCP server)
- Open source
- Partial
- 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 Fewsats's listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.
- Oct 19, 2026Verified: deploy spec
- Sep 26, 2026Edited: entity class, resource type
- Jul 24, 2026Sato Hub began tracking this listing
- Jul 19, 2026Listed on Sato Hub
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Reference
QuestionsWhat people ask about this pageShowHide
Questions people ask about Fewsats
- Is Fewsats open source?
- Partly. Some of Fewsats is published as source (https://github.com/Fewsats/fewsats-mcp) and some is not. Checked as of 2026-10-21.
- Which chains does Fewsats support?
- Fewsats lists support for Bitcoin, Multichain as of 2026-10-21.
- Is Fewsats still maintained?
- The most recent code activity Sato Hub observed was on 2025-05-27 (last commit 2025-05-27), which Sato Hub labels "Dormant". Posts on X are not counted as maintenance. Activity is a recency signal, not a quality judgment.
- How do I install or run Fewsats?
- Python (uvx recommended, pip supported). Install: uvx fewsats-mcp. Entry: {"mcpServers":{"Fewsats Server":{"command":"uvx","args":["fewsats-mcp"],"env":{"FEWSATS_API_KEY":"YOUR_FEWSATS_API_KEY"}}}}. This is taken from the project's own documentation and has not been reproduced by Sato Hub. It runs as an MCP server (uvx fewsats-mcp (stdio); pip alternative: `pip install fewsats-mcp` then `fewsats-mcp`).
- Is Fewsats verified on Sato Hub?
- No independent verification is on record for Fewsats; its verification status is "Unverified" and its Sato Score is 43 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. "Fewsats — Sato Hub." Sato Hub, updated 2026-10-21, accessed 2026-10-21. https://satohub.ai/resources/fewsatsData 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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