ONES vs YouTrack

ONES 62

Closed service under terms naming The Beautiful ONES Technology PTE. LTD. and Singapore law (15 of 30). The privacy policy of 7 January 2026 deletes business data 30 days after a service ends with no login for 365 days, and honours deletion requests within 30 days, but no DPA or subprocessor list is public (12 of 30). Endpoint version histories record changes, with no deprecation policy (5 of 20). The privacy policy names AWS, Oracle cloud and OpenAI and says data is transferred mostly to the US, China and Singapore, with no subprocessor list or regions (6 of 20). 15 + 12 + 5 + 6 = 38.

YouTrack 82

All per the 8 October check, not re-read on 4 November under JetBrains' website terms. Closed service under the YouTrack Cloud Terms of Service, version 2.0 effective 14 August 2024, naming JetBrains s.r.o. and Czech law (15 of 30). The terms, the Privacy Notice (version 3.2, 12 June 2026) and the Data Processing Addendum agree. Backups are kept for one month after a deletion request and six months after termination, JetBrains says it will not train AI models on customer data, and native AI runs on models JetBrains deploys. The DPA dates from 27 April 2022 (24 of 30). Deprecations are announced by version (Hub endpoints in 2026.1, the implicit flow), with no policy or notice period, and the terms reserve the right to alter capabilities (8 of 20). The third-party list, version 3.15 effective 30 September 2026, names Amazon Web Services EMEA SARL for YouTrack Cloud, and the owner picks one of four AWS regions (18 of 20).

ONES 55

No downloadable OpenAPI file was found. The reference is rendered pages, and the MCP docs list tool names and one-line descriptions without input schemas (0). llms.txt with sized indexes and a Markdown copy of every page (10). Endpoint and tool descriptions state what each does in one line, with version history per endpoint but little on when not to use one (10 of 20). Parameters are typed with defaults, limits (limit at most 100) and required marks (10 of 15). Each endpoint lists 200, 401, 403, 404 and 500 responses with schemas and examples (10 of 15). API version 2.0, a History table per endpoint and dated release notes (15). 0 + 10 + 10 + 10 + 10 + 15 = 55.

YouTrack 39

The 8 October contract reading was the OpenAPI document at /api/openapi.json on JetBrains' own YouTrack instance, the product's API, and so is the count of operations behind the typed-input line. Both are struck, so the contract line is 0 (25 before) and the typed-input line is 0 (8 before). Both docs sites have an llms.txt and a Markdown copy of each page (10). The reference pages describe each resource with required permissions, and the MCP tools page says what each of the 23 tools returns and which tool to call first (13 of 20). Reference pages carry sample requests and responses, and the only error material found was the OAuth error tables and two troubleshooting pages (6 of 15). A REST API changelog lists additions and deprecations for 2026.1 and 2026.2 by version, without dates, and the path carries no version (10 of 15). All per the 8 October check, not re-read on 4 November under JetBrains' website terms.

ONES 40

Scored on the MCP server and the Open API together. 67 MCP tools load by default (5), and a client granted fewer scope groups is limited to fewer tools (5 back). Lists take limit and cursor with project and issue type filters, and query_issues_by_onesql runs a filtered query (15 of 20). Error status codes are documented per endpoint with response schemas, but no error code catalogue was found (8 of 20). No idempotency keys or MCP annotations found (0). One official SDK, @ones-open/node-sdk, aimed at ONES Apps, and the MCP setup is one mcp-remote line (7 of 15). 10 + 15 + 8 + 0 + 7 = 40.

YouTrack 55

All per the 8 October check, not re-read on 4 November under JetBrains' website terms. 23 predefined MCP tools (15), and the tools and ignoreTools URL parameters cut the list a client receives (7 more, 22 of 25). On REST the fields parameter selects attributes and nested attributes, $top and $skip page most collections at 42 items by default, issue activities use cursors, /api/issues takes the search query language, and MCP list tools take offset and limit (20). No error reference was found for the REST API. The MCP docs say manage_issue_tags returns suggestions when a tag is not found (5 of 20). No idempotency keys were found, and the MCP tool definitions, with any readOnlyHint and destructiveHint, were not read. muteUpdateNotifications suppresses notifications on writes (2 of 20). Creating an issue needs only summary and project, but every read needs fields or it returns only id and $type. No current official SDK was found, and YouTrackSharp for .NET was last tagged 2022.3.1 on 31 March 2023 (6 of 15).

ONES 68

Latest dated release notes are 7.33.0 on 30 September 2026, 37 days before this check. The registry entry moved to 1.0.3 on 8 October with no release note behind it, so it doesn't set recency (20). Nine dated releases since 8 August, several adding Open API endpoints or MCP capabilities (7.23.0, 7.26.0, 7.27.0, 7.29.0) (20). Closed service with a public changelog and support by email, with no public issue tracker (8 of 15). Verified com.ones/ones namespace in the official MCP registry (15). One official SDK for apps, with package health not checked (5 of 10). 20 + 20 + 8 + 15 + 5 = 68.

YouTrack 54

The 8 October release dates came from JetBrains' release feed, a JSON data endpoint, and are struck. JetBrains' public youtrack-apps repository, home of the official youtrack-app CLI and the YouTrack Apps agent skill for building apps that can add REST endpoints and MCP tools, tagged skill releases v1.0.0 to v1.0.8 between 14 August and 28 September 2026. The latest is 37 days old (20, 30 before) and nine fall in the 90 days from 6 August (20). The CLI version bumps of 14 and 20 August carry no tag or changelog and aren't counted. Responsiveness, per the 8 October check, not re-read on 4 November under JetBrains' website terms, a REST API changelog and a support request form; response times not checked (11 of 15, an in-between value kept). No current official SDK found, and YouTrackSharp's newest tag is 2022.3.1 of 31 March 2023 (0). Package health, per the 8 October check, not re-read on 4 November under JetBrains' website terms (3 of 10, an in-between value kept).

ONES 25

Graded as a hosted service on ONES.com Cloud's Open API and MCP server. No status page is linked from ones.com, the trust centre or the docs, and status.ones.com did not resolve (0). With no readable history the incident line scores 5. No rate limit with numbers was found in the developer docs index or the terms, which only reserve the right to restrict excessive traffic (0). No 429, backoff or idempotency guidance found (0). The pricing page states 99.9% uptime on Business and 99.95% on Enterprise (10). The MCP server has been in the release notes since 6.42.0 on 26 August 2025 and carries no beta label (10). 0 + 5 + 0 + 0 + 10 + 10 = 25.

YouTrack 15

Graded on YouTrack Cloud's REST API and built-in remote MCP server, with the hosted lines. JetBrains' Website Terms of Use bar data mining and robots on every JetBrains site, so nothing on JetBrains hosts was requested on 4 November and the 8 October readings are kept as not re-read, except those taken from data endpoints, which are struck. The status page at jetbrains.com/youtrack/cloud/status draws its zone figures by script from a data feed the 8 October check read directly. That feed is a barred endpoint, so no component or zone reading remains (0, 10 before) and no incident history is readable (5, 10 before). No rate limits were found in the reviewed documentation (0). No 429 handling, backoff guidance or idempotency keys were found (0). The Cloud terms promise commercially reasonable efforts and no SLA was found (0). The REST API and the MCP server (since 2025.3) are not marked beta (10), per the 8 October check, not re-read on 4 November under JetBrains' website terms.