# Change history: API guide for the model

[← Changelog](/docs/changelog). Entries: 38.

- 2026-10-01 [FIX-1001-23: a third-party agent key is no longer told to obtain a deploy key](/docs/changelog/2026-10-01#fix-1001-23-a-third-party-agent-key-is-no-longer-told-to-obtain-a-deploy-key)
- 2026-09-24 [FIX-0924-6: the aggregation reference in GET /v1/guide describes POST aggregation and numeric-function fields by type](/docs/changelog/2026-09-24#fix-0924-6-the-aggregation-reference-in-get-v1-guide-describes-post-aggregation-and-numeric-function-fields-by-type)
- 2026-09-15 [NEW-0915-13: task comment attachments and comment file download](/docs/changelog/2026-09-15#new-0915-13-task-comment-attachments-and-comment-file-download)
- 2026-09-14 [FIX-0914-10: open line queue fields refuse clearly instead of surfacing a Bitrix24 error](/docs/changelog/2026-09-14#fix-0914-10-open-line-queue-fields-refuse-clearly-instead-of-surfacing-a-bitrix24-error)
- 2026-09-14 [FIX-0914-23: rate limit descriptions state the platform-wide cap and point at the header with the effective value](/docs/changelog/2026-09-14#fix-0914-23-rate-limit-descriptions-state-the-platform-wide-cap-and-point-at-the-header-with-the-effective-value)
- 2026-09-13 [FIX-0913-1: the API description now names the refusals shared by every operation](/docs/changelog/2026-09-13#fix-0913-1-the-api-description-now-names-the-refusals-shared-by-every-operation)
- 2026-09-11 [FIX-0911-1: the OpenAPI spec's scope slice no longer pulls in unrelated hand-written sections](/docs/changelog/2026-09-11#fix-0911-1-the-openapi-spec-s-scope-slice-no-longer-pulls-in-unrelated-hand-written-sections)
- 2026-09-11 [FIX-0911-2: POST /v1/doc-templates refusals point to the file field, not to Drive](/docs/changelog/2026-09-11#fix-0911-2-post-v1-doc-templates-refusals-point-to-the-file-field-not-to-drive)
- 2026-09-01 [FIX-0901-3: rate limit descriptions now name the replica share, not just the total cap](/docs/changelog/2026-09-01#fix-0901-3-rate-limit-descriptions-now-name-the-replica-share-not-just-the-total-cap)
- 2026-08-29 [FIX-0829-1: importable field flag in guide](/docs/changelog/2026-08-29#fix-0829-1-importable-field-flag-in-guide)
- 2026-08-28 [FIX-0828-3: GET /v1/guide returns the paging rules as a single paginationCanon block](/docs/changelog/2026-08-28#fix-0828-3-get-v1-guide-returns-the-paging-rules-as-a-single-paginationcanon-block)
- 2026-08-27 [NEW-0827-9: array element schemas are available in field contracts](/docs/changelog/2026-08-27#new-0827-9-array-element-schemas-are-available-in-field-contracts)
- 2026-08-27 [NEW-0827-11: the self-description now points at the Cowork/Code promo code docs](/docs/changelog/2026-08-27#new-0827-11-the-self-description-now-points-at-the-cowork-code-promo-code-docs)
- 2026-08-27 [FIX-0827-12: the Cowork/Code rate limits no longer quote a number the client never receives](/docs/changelog/2026-08-27#fix-0827-12-the-cowork-code-rate-limits-no-longer-quote-a-number-the-client-never-receives)
- 2026-08-26 [FIX-0826-3: 404 responses for Bitrix24 method names now point to the V1 route](/docs/changelog/2026-08-26#fix-0826-3-404-responses-for-bitrix24-method-names-now-point-to-the-v1-route)
- 2026-08-24 [FIX-0824-15: the `datePeriod` field schema is now visible in `GET /v1/bookings/fields`](/docs/changelog/2026-08-24#fix-0824-15-the-dateperiod-field-schema-is-now-visible-in-get-v1-bookings-fields)
- 2026-08-21 [FIX-0821-2: currencyId and explicit selection of non-returned fields](/docs/changelog/2026-08-21#fix-0821-2-currencyid-and-explicit-selection-of-non-returned-fields)
- 2026-08-20 [NEW-0820-1: the Cowork subscription snapshot is described in the API specification](/docs/changelog/2026-08-20#new-0820-1-the-cowork-subscription-snapshot-is-described-in-the-api-specification)
- 2026-08-12 [NEW-0812-6: deal product rows: the response now signals truncation](/docs/changelog/2026-08-12#new-0812-6-deal-product-rows-the-response-now-signals-truncation)
- 2026-08-11 [FIX-0811-12: the /v1/guide reference returns a docs link for the telephony-lines entity](/docs/changelog/2026-08-11#fix-0811-12-the-v1-guide-reference-returns-a-docs-link-for-the-telephony-lines-entity)
- 2026-08-10 [BC-0810-3: batch reads no longer bypass an operation the entity turns off](/docs/changelog/2026-08-10#bc-0810-3-batch-reads-no-longer-bypass-an-operation-the-entity-turns-off)
- 2026-08-07 [BC-0807-17: an activities aggregate needs a narrowing filter](/docs/changelog/2026-08-07#bc-0807-17-an-activities-aggregate-needs-a-narrowing-filter)
- 2026-08-06 [FIX-0806-3: the operation registry in GET /v1/guide now lists what actually works](/docs/changelog/2026-08-06#fix-0806-3-the-operation-registry-in-get-v1-guide-now-lists-what-actually-works)
- 2026-08-06 [NEW-0806-14: the site and employee field maps now carry labels, descriptions and value lists](/docs/changelog/2026-08-06#new-0806-14-the-site-and-employee-field-maps-now-carry-labels-descriptions-and-value-lists)
- 2026-08-05 [FIX-0805-10: the API schema now covers the session exchange and embed slots, and states its own coverage honestly](/docs/changelog/2026-08-05#fix-0805-10-the-api-schema-now-covers-the-session-exchange-and-embed-slots-and-states-its-own-coverage-honestly)
- 2026-08-04 [FIX-0804-5: bank details: `entityTypeId` marked as a field that is never returned](/docs/changelog/2026-08-04#fix-0804-5-bank-details-entitytypeid-marked-as-a-field-that-is-never-returned)
- 2026-08-04 [FIX-0804-6: discover names the real path identifier](/docs/changelog/2026-08-04#fix-0804-6-discover-names-the-real-path-identifier)
- 2026-08-04 [FIX-0804-7: telephony lines: `name` declared nullable, `serverName` marked as never returned](/docs/changelog/2026-08-04#fix-0804-7-telephony-lines-name-declared-nullable-servername-marked-as-never-returned)
- 2026-07-30 [FIX-0730-13: the spec declares create-mandatory fields on create, and stopped demanding them on update](/docs/changelog/2026-07-30#fix-0730-13-the-spec-declares-create-mandatory-fields-on-create-and-stopped-demanding-them-on-update)
- 2026-07-28 [NEW-0728-3: pointers to Open Channels, task checklists and app blueprints in the self-description responses](/docs/changelog/2026-07-28#new-0728-3-pointers-to-open-channels-task-checklists-and-app-blueprints-in-the-self-description-responses)
- 2026-07-28 [BC-0728-5: unified 404 envelope for nonexistent /v1 routes](/docs/changelog/2026-07-28#bc-0728-5-unified-404-envelope-for-nonexistent-v1-routes)
- 2026-07-17 [NEW-0717-3: the catalog field references now report nullable fields](/docs/changelog/2026-07-17#new-0717-3-the-catalog-field-references-now-report-nullable-fields)
- 2026-07-14 [NEW-0714-1: OpenAPI spec: 3.1 validity, field semantics, and a scope slice](/docs/changelog/2026-07-14#new-0714-1-openapi-spec-3-1-validity-field-semantics-and-a-scope-slice)
- 2026-07-14 [FIX-0714-18: clearer /fields error for task comments and task time entries](/docs/changelog/2026-07-14#fix-0714-18-clearer-fields-error-for-task-comments-and-task-time-entries)
- 2026-07-14 [FIX-0714-23: OpenAPI: per-entity batch endpoint body is now documented correctly (action + items/ids/calls)](/docs/changelog/2026-07-14#fix-0714-23-openapi-per-entity-batch-endpoint-body-is-now-documented-correctly-action-items-ids-calls)
- 2026-07-09 [NEW-0709-10: Key self-description in GET /v1/guide](/docs/changelog/2026-07-09#new-0709-10-key-self-description-in-get-v1-guide)
- 2026-07-02 [NEW-0702-12: workgroups: aggregate operation and groupBy fields exposed](/docs/changelog/2026-07-02#new-0702-12-workgroups-aggregate-operation-and-groupby-fields-exposed)
- 2026-07-01 [NEW-0701-4: Extended static field contract in /v1/guide and a schema-discovery pointer in /v1/me](/docs/changelog/2026-07-01#new-0701-4-extended-static-field-contract-in-v1-guide-and-a-schema-discovery-pointer-in-v1-me)