> ## Documentation Index > Fetch the complete documentation index at: https://docs.isnap.ai/llms.txt > Use this file to discover all available pages before exploring further. # Get the sending limits of a line > Returns the five sending counters of a line with their limits, the reply-lane budget and the time each full counter frees room. * **Credential:** an API key of the owner of the line. See [Reading the limits and the queue](/guides/sending-limits#reading-the-limits-and-the-queue). * **Line-scoped keys:** a [line-scoped key](/authentication#line-scoped-keys) gets `403 forbidden` unless the line is in its list, even when the line does not exist. * **Events:** none. * **Rolling windows:** every counter counts over a rolling window and none resets at midnight. See [The five limits](/guides/sending-limits#the-five-limits). * **`*_frees_at`:** the time at which a counter drops back under its limit. `null` when the counter is under its limit, when the limit is 0, or when the time could not be computed: read `null` as "no known wait". * **Limits in force:** the limits returned are the ones in force on the line. To change them, see [Configuration](/guides/managing-lines#configuration). ## Errors | Status | `error.code` | When | | - | - | - | | 403 | `forbidden` | The request uses a line-scoped key, and the line is not in its list. | | 404 | `not_found` | No line has this id, or the line is not yours. | The errors that every operation shares are in [Errors](/errors-and-rate-limits#errors). ## OpenAPI ````yaml GET /v1/lines/{id}/quota openapi: 3.0.0 info: title: iSnap API version: 2.45.0 description: >- The iSnap API sends and receives iMessage, RCS and SMS on real phone lines, manages those lines, and reports events through webhooks. Every message is sent to a real recipient, with an `isnap_live_` key and with an `isnap_test_` key alike. Retry a `429` after `Retry-After` seconds. Retry a `500` or a `503` up to 2 times, with exponential backoff. Do not retry any other `4xx`: fix the request. Retry a write only on an operation that honors `Idempotency-Key`, with the key of the first attempt. Responses carry personal data: handles, names and message text. servers: - url: https://api.isnap.ai security: - bearerAuth: [] paths: /v1/lines/{id}/quota: get: summary: Get the sending limits of a line description: >- Returns the five sending limits of a line you own with their counters, the reply-lane allowance, the time at which each full counter drops back under its limit, and a flag per counter that is `true` from 80% of its limit. Accepts an API key. Every counter covers a rolling window: the last 60 seconds, the last 60 minutes or the last 24 hours. No counter resets at midnight. A held message counts when it is released, not when it is accepted. parameters: - schema: type: string pattern: ^line_[0-9A-Za-z]{25}$ description: 'Id of a line: `line_` followed by 25 letters or digits.' required: true description: 'Id of a line: `line_` followed by 25 letters or digits.' name: id in: path responses: '200': description: The sending limits of the line and their counters. content: application/json: schema: $ref: '#/components/schemas/QuotaEnvelope' '400': description: >- Invalid request. `error.code` is `validation_failed` when a parameter, a header or the body does not match its schema: `error.issues` then lists each problem. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '401': description: No valid credential. `error.code` is `unauthorized`. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '403': description: >- Refused. `forbidden`: the key is line-scoped and this line is outside its list. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '404': description: 'Not found. `not_found`: the line does not exist, or it is not yours.' content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '429': description: >- Too many requests. `error.code` is `rate_limit_exceeded` when more than 100 requests came from the same network address in 60 seconds, whatever their API key or account: wait `error.retry_after` seconds. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' '500': description: >- Unexpected failure. `error.code` is `internal_error`. An operation that takes a JSON body also returns it when the body, sent as `application/json`, is not valid JSON. Quote `trace_id` when you report it to iSnap. content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' security: - bearerAuth: [] components: schemas: QuotaEnvelope: type: object properties: success: type: boolean enum: - true description: Always `true` on a success response. data: $ref: '#/components/schemas/QuotaSnapshot' trace_id: type: string description: >- Trace id of the request that produced this response: 32 lowercase hexadecimal characters. Quote it when you report a problem to iSnap. request_id: type: string description: >- Id of the request that produced this response: `req_` followed by 25 letters or digits. required: - success - data - trace_id - request_id ErrorEnvelope: type: object properties: success: type: boolean enum: - false description: Always `false` on an error response. data: nullable: true description: Always `null` on an error response. error: type: object properties: status: type: integer description: The HTTP status of the response. code: type: string description: >- Stable machine-readable code that names the refusal. Branch on this value. message: type: string description: >- Text for a person. It can change between versions: do not branch on it. retry_after: type: integer nullable: true description: >- Seconds to wait before the next attempt. Set on the `429` responses that know a delay, where the `Retry-After` header carries the same value. When it is above 60 seconds, do not wait in a request: schedule the call, or report the time. `null` on every other error. retry_at: type: string nullable: true description: >- ISO 8601 timestamp at which the refusal ends. Set only on `429 rebind_cap_reached`. `null` on every other error. issues: type: array nullable: true items: type: object properties: path: type: array items: anyOf: - type: string - type: number description: >- Where the problem is: the field names and array indexes that lead to it. message: type: string description: Text for a person. code: type: string description: >- Kind of problem. On `validation_failed`, for example `invalid_type`, `invalid_value`, `invalid_format`, `invalid_union`, `invalid_key`, `invalid_element`, `too_small`, `too_big`, `not_multiple_of`, `unrecognized_keys` or `custom`. The list is open: read `path` and `message`. min: type: integer description: >- Smallest accepted value. Present only on `limit_out_of_bounds`, `mac_quantity_not_a_pack`, `byop_reduction_strands_mac_sessions` and `byop_reduction_strands_byod_lines`. max: type: integer description: >- Largest accepted value. Present only on `limit_out_of_bounds` and `mac_sessions_exceed_byop_lines`, and on the `too_big` issue of an `Idempotency-Key` header longer than 255 characters. required: - path - message - code description: >- Problems found in the request, one entry each. Set on most `400 validation_failed` responses and on the refusals that name a field: a refused `handle` of `POST /v1/lookup` has `issues: null`. `null` on every other error. required: - status - code - message - retry_after - retry_at - issues description: >- What went wrong. The six fields are always present; `retry_after`, `retry_at` and `issues` are `null` when they do not apply. trace_id: type: string description: >- Trace id of the request that produced this response: 32 lowercase hexadecimal characters. Quote it when you report a problem to iSnap. request_id: type: string description: >- Id of the request that produced this response: `req_` followed by 25 letters or digits. required: - success - data - error - trace_id - request_id description: The body of an error response. QuotaSnapshot: type: object properties: line_id: type: string pattern: ^line_[0-9A-Za-z]{25}$ description: 'Id of a line: `line_` followed by 25 letters or digits.' daily_new_contacts_used: type: integer minimum: 0 description: Distinct new contacts the line messaged in the last 24 hours. daily_new_contact_limit: type: integer minimum: 0 description: >- Sending limit: distinct new contacts the line can message per rolling 24 hours. A new contact is a recipient who has not messaged the line in the last 30 days, the default window. daily_known_contacts_used: type: integer minimum: 0 description: Distinct known contacts the line messaged in the last 24 hours. daily_known_contact_limit: type: integer minimum: 0 description: >- Sending limit: distinct known contacts the line can message per rolling 24 hours. A known contact is a recipient who messaged the line in the last 30 days, the default window. daily_messages_used: type: integer minimum: 0 description: Messages the line sent in the last 24 hours. daily_total_message_limit: type: integer minimum: 0 description: 'Sending limit: messages per rolling 24 hours.' hourly_messages_used: type: integer minimum: 0 description: Messages the line sent in the last 60 minutes. hourly_message_limit: type: integer minimum: 0 description: 'Sending limit: messages per rolling 60 minutes.' minute_messages_used: type: integer minimum: 0 description: Messages the line sent in the last 60 seconds. minute_message_limit: type: integer minimum: 0 description: 'Sending limit: messages per rolling 60 seconds.' daily_replies_used: type: integer minimum: 0 description: >- Replies that used the reply lane to pass a sending limit in the last 24 hours. daily_reply_limit: type: integer minimum: 0 description: >- Reply-lane allowance: the number of replies per rolling 24 hours that can pass a sending limit through the reply lane. minute_frees_at: type: string nullable: true description: >- Timestamp at which `minute_messages_used` drops back under its limit (ISO 8601, UTC). `null` when the counter is under its limit, when the limit is 0, or when the time is not known: read `null` as no known wait. hourly_frees_at: type: string nullable: true description: >- Timestamp at which `hourly_messages_used` drops back under its limit (ISO 8601, UTC). `null` when the counter is under its limit, when the limit is 0, or when the time is not known: read `null` as no known wait. daily_total_frees_at: type: string nullable: true description: >- Timestamp at which `daily_messages_used` drops back under its limit (ISO 8601, UTC). `null` when the counter is under its limit, when the limit is 0, or when the time is not known: read `null` as no known wait. daily_new_frees_at: type: string nullable: true description: >- Timestamp at which `daily_new_contacts_used` drops back under its limit (ISO 8601, UTC). `null` when the counter is under its limit, when the limit is 0, or when the time is not known: read `null` as no known wait. daily_known_frees_at: type: string nullable: true description: >- Timestamp at which `daily_known_contacts_used` drops back under its limit (ISO 8601, UTC). `null` when the counter is under its limit, when the limit is 0, or when the time is not known: read `null` as no known wait. daily_reply_frees_at: type: string nullable: true description: >- Timestamp at which `daily_replies_used` drops back under its limit (ISO 8601, UTC). `null` when the counter is under its limit, when the limit is 0, or when the time is not known: read `null` as no known wait. buckets_warning: $ref: '#/components/schemas/BucketsWarning' required: - line_id - daily_new_contacts_used - daily_new_contact_limit - daily_known_contacts_used - daily_known_contact_limit - daily_messages_used - daily_total_message_limit - hourly_messages_used - hourly_message_limit - minute_messages_used - minute_message_limit - daily_replies_used - daily_reply_limit - minute_frees_at - hourly_frees_at - daily_total_frees_at - daily_new_frees_at - daily_known_frees_at - daily_reply_frees_at - buckets_warning description: >- The sending limits of a line with their counters. Every counter covers a rolling window. BucketsWarning: type: object properties: new_contacts_at_80_percent: type: boolean description: >- `true` when `daily_new_contacts_used` is at 80% of `daily_new_contact_limit` or more. known_contacts_at_80_percent: type: boolean description: >- `true` when `daily_known_contacts_used` is at 80% of `daily_known_contact_limit` or more. messages_at_80_percent: type: boolean description: >- `true` when `daily_messages_used` is at 80% of `daily_total_message_limit` or more. hourly_at_80_percent: type: boolean description: >- `true` when `hourly_messages_used` is at 80% of `hourly_message_limit` or more. minute_at_80_percent: type: boolean description: >- `true` when `minute_messages_used` is at 80% of `minute_message_limit` or more. required: - new_contacts_at_80_percent - known_contacts_at_80_percent - messages_at_80_percent - hourly_at_80_percent - minute_at_80_percent description: >- One flag per sending limit: `true` from 80% of the limit. A flag is `false` when its limit is 0. securitySchemes: bearerAuth: type: http scheme: bearer description: >- An API key created in the iSnap dashboard, or a trial key, sent as `Authorization: Bearer `. An API key starts with `isnap_live_` or `isnap_test_`; both act on the same account, lines and billing. A trial key acts on its trial only. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.