API endpoint monitoring

API endpoint monitoring is an ongoing (monthly) service: for an agreed list of endpoints we regularly send check requests and control availability and the response code (2xx/4xx/5xx), response time and timeouts, the correctness of the format and basic contract (expected fields/structure/type), authorization, and, if needed, end-to-end scenarios of several calls. On a failure, slowdown or deviation from the expected response an alert arrives with which endpoint and what is wrong. This catches both outages and silent regressions: the response format changed after a release, authorization broke, latency rose, pagination broke — things that hit the mobile app, the frontend and partner integrations. Honestly about requirements: for protected endpoints access is needed — test keys/account, and agreement so checks do not touch production data (we use test methods/environment where possible). Honestly about the essence: this is detection and alerting, NOT fixing — we do not edit the API code, fix the backend or change the contract; remediation is done by your team or by us separately. Honestly about the method and coverage: checks run at intervals and only on the configured endpoints and scenarios — short failures between checks and uncovered methods can be missed; contract checks are compared against an agreed expectation that must be maintained as the API changes. Coverage is the configured endpoints; someone must react to an alert. An important boundary: this is outside-in API monitoring, not API development, not load testing and not APM (traces from the inside — separate, complementary). If the API is simple and stable or has almost no external consumers, continuous monitoring may be overkill. Picture this: instead of 'the mobile app stopped logging users in after a backend release and we found out from store reviews' you get an alert within a minute that the auth endpoint returns 500. The base price starts from 10,000 ₽ per month; it depends on the number of endpoints and scenario complexity.

• The API fails or changes format after a release and you learn from clients/partners.
• The mobile app or frontend breaks due to a silent API regression.
• You do not know about latency growth and timeouts on endpoints in advance.
• Partner integrations break and it is unclear whose side it is.

• Regular check requests on agreed endpoints
• Availability and response code (2xx/4xx/5xx), response time, timeouts
• Correctness of format and basic contract (fields/structure/type)
• Authorization checks and, if needed, end-to-end scenarios
• Alerts on a failure, slowdown or deviation from the expected
• Maintaining the expected contract as the API changes
• Monthly continuous operation
• An alert channel of your choice (email, messenger, webhook)

• You learn about an API failure first, not from clients/partners
• You see which endpoint, code and what exactly is wrong
• You catch a format/auth regression after a release earlier
• You have facts for the team to fix it (the fix — separately)

• We agree on endpoints, expected responses/contract, scenarios and the alert channel; collect test access
• We set up checks, contract control and latency thresholds
• We launch monitoring, maintain expectations as the API changes

• Will you fix the API if it broke?

  No. We detect a failure/regression and notify with details, but we do not edit the API code, fix the backend or change the contract. Remediation is done by your team or by us separately; monitoring provides speed and facts.

• Is API access needed?

  For protected endpoints — yes: test keys/account and agreement so checks do not touch production data (we use test methods/environment where possible). Public endpoints we check without this.

• Will you catch any failure?

  Not guaranteed. Checks run at intervals and only on the configured endpoints — short failures between checks and uncovered methods can be missed. The contract is compared against an agreed expectation that must be updated as the API changes.