We reviewed 200 major SaaS services in the Japanese market. Based on primary-source verification and a fully disclosed scoring formula, 41 services rated A or above are certified.
Based on AXR (Agent Experience Rating) scores, 41 services scoring 70 points or above (grade A+) are certified. Order follows the Japanese listing.
| Service | Provider | Category |
|---|---|---|
| AgileWorks | ATLED CORP. | Expense & Workflow |
| Color Me Shop | GMO Pepabo, Inc. | E-commerce |
| Square | Block, Inc. | Payments |
| DocuSign | DocuSign, Inc. | Legal & Contracts |
| Notion | Notion Labs, Inc. | Project Management |
| freee Accounting | freee K.K. | Accounting |
| freee HR | freee K.K. | HR & Labor |
| freee Payroll | freee K.K. | HR & Payroll |
| freee Sign | freee K.K. | Legal & Contracts |
| Wrike | Citrix Systems (Wrike) | Project Management |
| Zoho CRM | Zoho Japan Corporation | CRM |
Logos are displayed at each vendor's request, in accordance with their brand guidelines.
| Service | Provider | Category |
|---|---|---|
| Chatwork | kubell Co., Ltd. | Communication |
| Concur Expense | SAP Concur | Expense & Workflow |
| Domo | Domo, Inc. | BI & Analytics |
| fincode byGMO | GMO Epsilon, Inc. | Payments |
| Freshdesk | Freshworks Inc. | Customer Support |
| GMO Payment Gateway | GMO Payment Gateway, Inc. | Payments |
| Jooto | PR TIMES Corporation | Project Management |
| Keeper | Keeper Security, Inc. | Security |
| kickflow | kickflow, Inc. | Workflow |
| kintone | Cybozu, Inc. | Communication |
| LINE Messaging API | LY Corporation | Communication |
| LINE Official Account | LY Corporation | Marketing |
| LINE WORKS | LINE WORKS Corporation | Communication |
| Logikura (freee Inventory) | freee K.K. | Logistics |
| Money Forward Cloud | Money Forward, Inc. | Accounting |
| Next Engine | NE Inc. | E-commerce |
| Nulab Backlog | Nulab Inc. | Project Management |
| OneLogin | OneLogin by One Identity | Security |
| Smaregi | Smaregi, Inc. | Payments |
| GMO Trust Login | GMO GlobalSign K.K. | Security |
| Zendesk | Zendesk G.K. | Customer Support |
| Service | Provider | Category |
|---|---|---|
| Garoon | Cybozu, Inc. | Communication |
| HENNGE One | HENNGE K.K. | Security |
| KING OF TIME | Human Technologies, Inc. | HR & Attendance |
| Lychee Redmine | Agileware Inc. | Project Management |
| Misoca | Yayoi Co., Ltd. | Accounting |
| Re:lation | Ingage Inc. | Customer Support |
| Sansan | Sansan, Inc. | CRM |
| SmartHR | SmartHR, Inc. | HR & Labor |
| Rakuten Ichiba | Rakuten Group, Inc. | E-commerce |
Of the 200 services reviewed, 194 were rated (excluding discontinued or merged products).
| Grade | Services | Criteria |
|---|---|---|
| AAA | 11 | 90 pts (perfect) |
| AA | 21 | 80–89 pts |
| A | 9 | 70–79 pts |
| BBB | 27 | 60–69 pts |
| BB | 47 | 50–59 pts |
| B | 20 | 40–49 pts |
| C | 1 | 30–39 pts |
| D | 56 | below 30 pts |
| Status | Services | Share |
|---|---|---|
| Official MCP | 37 | 19% |
| Third-party MCP | 13 | 7% |
| API only | 88 | 45% |
| No public API | 56 | 29% |
Official MCP = an MCP server whose availability the vendor itself has announced. Third-party MCP = provided by the community or third parties such as CData.
In addition to the 41 certified services published on this page, the full ranking list of every service reviewed (grade, score, MCP availability, authentication method — all facts verified against each vendor's primary sources, 2026-07-16) is available free of charge as CSV. Please register your email address to download.
Ratings are rules-based evaluations under the AXR (Agent Experience Rating) framework. No subjective LLM judgement is used. The same checklist is applied to every service, based solely on each vendor's primary sources (developer documentation, press releases, official repositories). Data collected by KanseiLink itself (integration recipe counts, measured connections, usage statistics) is never used in Award scoring — the depth of our own database cannot influence any service's grade. Grade bands: AAA (90+) / AA (80+) / A (70+) / BBB (60+) / BB (50+) / B (40+) / C (30+) / D (below 30).
| Official MCP available | +50 |
| Third-party MCP | +40 |
| Public API (no MCP) | +30 |
| OAuth 2.0 | +20 |
| Client Credentials | +15 |
| Bearer Token / API key | +10 |
| Basic auth | +5 |
| Public developer documentation | +10 |
| MCP package distribution (npm/GitHub) | +10 |
| Official MCP + OAuth 2.0 + docs + npm | = 90 (AAA) |
| Third-party MCP + OAuth 2.0 + docs + npm | = 80 (AA) |
| Public API + OAuth 2.0 + docs | = 60 (BBB) |
| Public API + API key + docs | = 50 (BB) |
We are not building an MCP ranking or an API directory. In the AI era, investors evaluate companies, companies select software, and AI agents choose tools. We believe Agent Readiness becomes the new decision standard for all of them.
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