arXiv MCP
https://arxiv-mcp.mtree.workers.devTwo pay-per-call x402 endpoints for arXiv: papers/search ($0.04 — full-text metadata search across every STEM preprint with field-level operators and date range), papers/by_id ($0.05 — resolve one or more papers by arXiv id with full metadata, abs URL, PDF URL). No signup, no API key — pay USDC on Base.
Reliability & health
Uptime and response time from our own unpaid probes, plus the reliability score built from them.
Uptime
100.0% avgResponse time
p50 167ms · p95 232msData table
| Bucket | Uptime | Probes | Response time |
|---|---|---|---|
| 7/22/2026, 12:00:00 AM | 100% | 1 | 154ms |
| 7/23/2026, 12:00:00 AM | 100% | 1 | 212ms |
| 7/24/2026, 12:00:00 AM | 100% | 1 | 40ms |
| 7/25/2026, 12:00:00 AM | 100% | 1 | 193ms |
| 7/26/2026, 12:00:00 AM | 100% | 1 | 149ms |
| 7/27/2026, 12:00:00 AM | 100% | 1 | 164ms |
| 7/28/2026, 12:00:00 AM | 100% | 1 | 163ms |
| 7/29/2026, 12:00:00 AM | 100% | 1 | 152ms |
| 7/30/2026, 12:00:00 AM | 100% | 1 | 165ms |
| 7/31/2026, 12:00:00 AM | 100% | 1 | 153ms |
| 8/1/2026, 12:00:00 AM | 100% | 1 | 152ms |
| 8/2/2026, 12:00:00 AM | 100% | 1 | 155ms |
| 8/3/2026, 12:00:00 AM | 100% | 1 | 154ms |
| 8/4/2026, 12:00:00 AM | 100% | 1 | 165ms |
| 8/5/2026, 12:00:00 AM | 100% | 1 | 164ms |
| 8/6/2026, 12:00:00 AM | 100% | 1 | 157ms |
| 8/7/2026, 12:00:00 AM | 100% | 1 | 131ms |
| 8/8/2026, 12:00:00 AM | 100% | 1 | 162ms |
| 8/9/2026, 12:00:00 AM | 100% | 1 | 160ms |
| 8/10/2026, 12:00:00 AM | 100% | 1 | 211ms |
| 8/11/2026, 12:00:00 AM | 100% | 1 | 161ms |
| 8/12/2026, 12:00:00 AM | 100% | 1 | 170ms |
| 8/13/2026, 12:00:00 AM | 100% | 1 | 177ms |
| 8/14/2026, 12:00:00 AM | 100% | 1 | 235ms |
| 8/15/2026, 12:00:00 AM | 100% | 1 | 202ms |
| 8/16/2026, 12:00:00 AM | 100% | 1 | 162ms |
| 8/17/2026, 12:00:00 AM | 100% | 1 | 191ms |
| 8/18/2026, 12:00:00 AM | 100% | 4 | 192ms |
| 8/19/2026, 12:00:00 AM | 100% | 21 | 162ms |
| 8/20/2026, 12:00:00 AM | 100% | 16 | 170ms |
- Availability
- 100
- Latency
- 100
- Security
- 100
- Transparency
- 36
- Activity
- not yet measured
How often it was reachable when we probed it (weight 35%).
How quickly it answers when it is up — fast scores high (weight 20%).
Whether it serves over working TLS / https (weight 15%).
Whether the operator disclosed what it does — description, schema, identity (weight 15%).
Observed on-chain payments to this endpoint's wallet — transactions, volume, and distinct paying wallets over the last month (weight 15%; not yet measured when we have not seen its wallet settle).
Confidence 100% — how much probe evidence backs this score. A thin history is flagged, not hidden.
See the scoring methodology for exactly how each number is computed.
Payment
- Currencies
- —
- Networks
- —
- Facilitator
- unknown
- SDK
- unknown
Operator
- Company
- inferred — unknown
- Jurisdiction
- —
- Registrar
- CloudFlare, Inc.
- Domain registered
- 2019-02-08
- Hosting network
- CLOUDFLARENET
- Hosting country
- —
Operator context is derived from public RDAP/TLS records and unverified. Company and country are only available for endpoints that publish them (an OV/EV TLS certificate or a non-redacted domain record); most endpoints are CDN-fronted and disclose neither.