What we tested
Probed live on 26 Sep 2026 against rubric v1.2. 3 of 5 checks passed. 2 unknown.
PROBE-VERIFIEDtier 2 of 3
What its MCP server offers
We connected, ran tools/list, and recorded what came back on 26 Sep 2026. 5 tools, served from mcp.fetcher.sh.
search_endpointsdescribe_endpointfetch_datacheck_balancetopup_credits
What an agent could do here
Read from the page’s own content, with the wording each was drawn from. Inference is kept separate from tested facts — an agent completing the action is tier 3.
UNVERIFIED
register“”https://fetcher.sh/api/credits/topup
Context
25 sites in the index share the category SDKs and API clients. 4 transactional sites share it.
How we grade
Three tiers. Every listing shows which one it has reached, and when. The rubric.
tier 1Declared
The site says agents are welcome in its robots.txt. A permission, not a capability.
tier 2Probe-verified
We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
tier 3Behaviourally verified
An agent completed the action end to end — booked, bought, submitted — and it worked.
Own this site?
Behavioural verification — an agent completing your booking, purchase or contact flow end to end, with the date published here — opens to a small founding cohort first. Leave an email to be in it.
Related verified sites
PriceEdge API DocumentationAPI documentation for integrating PriceEdge pricing systems with applications and data pipelines, including authentication, reading and updating table data, price extraction, and webhook setup for real-time updates.
SDKs and API clients Abstract APIDocumentation site for Abstract API offering data validation, enrichment, and intelligence APIs including email validation, phone intelligence, IP geolocation, company enrichment, avatar generation, web scraping, and financial data validation.
SDKs and API clients Captain DataAPI documentation for Captain Data, providing endpoints to find, search, and enrich data about people and companies from LinkedIn for sales prospecting, recruitment, and business intelligence workflows.
SDKs and API clients Descripio APIAPI providing Amazon product review data including triggering review scraping jobs, polling job status, and retrieving cached review data for developers.
SDKs and API clients Poix API DocumentationAPI documentation for Poix platform providing YouTube data access including video search, caption retrieval, channel and video details, comment analysis, and media file access.
SDKs and API clients Sorsa Developer PlatformAPI platform providing programmatic access to X (Twitter) data for searching tweets, analyzing user profiles, tracking mentions, verifying campaign participation, monitoring engagement, and extracting historical tweet data.
SDKs and API clients PeekalinkPeekalink provides a Link Preview API with extensive documentation covering supported link types, scalability, error handling, and advanced features, aimed at developers integrating link preview capabilities.
SDKs and API clients ScreenshotMAX APIScreenshotMAX API provides programmatic capture of screenshots, animated screenshots, PDF generation, and web scraping via HTTP+JSON requests, with SDKs for JavaScript, Python, and PHP, supporting authentication, async webhooks, GPU rendering, and scheduled tasks.
SDKs and API clients Record generated from a live database query. Method: about the index.
How we found this site: probe discovery. This site didn’t declare agent access — we found it by checking the open web. Everything above was tested the same way, against the same rubric, on the date shown. How we choose what to check, and how to opt out →