--- title: "Get a custom field of a company" method: GET path: "/v1/companies/{company_id}/custom-fields/{key}" tags: ["CompanyCustomFields"] --- # Get a custom field of a company `GET /v1/companies/{company_id}/custom-fields/{key}` ## Request - Base URL: `https://app.beel.es/api` - URL: `https://app.beel.es/api/v1/companies/{company_id}/custom-fields/{key}` - Auth: HTTP bearer Returns one custom field of this company, archived or not, with the options that apply to the query: the common ones plus, with `customer_id`, those of that customer. Archived options are left out unless `include_archived=true`. A field with `suggest_values: false` carries no options; list them with `GET /v1/companies/{company_id}/custom-fields/{key}/options`. ## Query parameters - `customer_id` string, uuid - `include_archived` boolean ## Response `200` The custom field. - CustomFieldResponse: The envelope every successful JSON response of the BeeL. API is wrapped in. There are no bare resources in v1 and none are planned: the payload always hangs off `data`. - A **single resource** is an object in `data`. - A **collection** hangs off a named key inside `data`, together with its `pagination`, also inside `data` — `data: {invoices: [...], pagination: {...}}`. - A collection carries `pagination` unless its operation declares itself a **closed catalogue**: a fixed, bounded list with nothing to page through. The declaration is explicit in the operation; a missing `pagination` is never something to infer. - `GET /v1/accounts` pages by cursor (`data: {accounts: [...], next_cursor}`). It is a documented variant of pagination, not another envelope. Putting the array straight into `data` with `pagination` as its sibling is the shape a v2 would adopt; v1 is not being flipped to it. - `success` boolean, required - `data` object, required: A custom field of the company's invoices, with the options that apply to the query that returned it. - `id` string, uuid, required: Unique identifier of the custom field. - `key` string, required: Identifier of the custom field within the company, chosen when the field is created: lowercase letters, digits and `_`, up to 64 characters. It never changes. BeeL. gives it no meaning of its own. - `label` string, required: Name people see next to the value, on screen and, if `show_on_pdf`, on the PDF. - `show_on_pdf` boolean, required: Whether the PDF of the invoice prints this field, in a block of its own under the notes. It applies to invoices saved from then on: an invoice keeps the setting it was saved with. - `suggest_values` boolean, required: Whether the field offers the values already used as options. With `true`, saving an invoice reuses an equivalent option or adds the value as a new one. With `false`, for a value that changes on every invoice such as an order number, the invoice stores the text as sent (without leading and trailing spaces), no option is created, and `options` comes back empty. Turning it off deletes no option: the existing ones are kept, can still be listed and managed under `GET /v1/companies/{company_id}/custom-fields/{key}/options`, and are offered again when it is turned back on. - `is_archived` boolean, required: An archived field cannot be added to new invoices and is left out of listings unless `include_archived=true`. Invoices that already carry it keep it. - `options` CustomFieldOption[], required: The options of this field that apply to the query: the common ones plus, when the query names a `customer_id`, the ones of that customer. Archived options appear only with `include_archived=true`. Always empty when `suggest_values` is `false`. To page through every option of the field, of every customer, use `GET /v1/companies/{company_id}/custom-fields/{key}/options`. - `id` string, uuid, required: Unique identifier of the option. - `value` string, required: Text of the option, exactly as it is shown and copied onto an invoice. - `customer_id` string, uuid, nullable, required: Customer the option belongs to, or `null` for an option common to every customer. It is set when the option is created and never changes. - `is_archived` boolean, required: An archived option is no longer offered and is left out of listings unless `include_archived=true`. Invoices that already carry its text keep it. - `meta` ResponseMeta - `timestamp` string, date-time - `request_id` string ## Other responses - `400`: The request target could not be read as declared, so nothing was looked up. Three causes, all named in `error.details`: a path or query parameter whose value does not parse as its type (`VALIDATION_ERROR` — a UUID that is not a UUID, an unknown enum value, an empty element in a list such as `status=ISSUED,`), a required parameter that was not sent (`MISSING_PARAMETER`), or a header that is meant to carry an identifier and does not (`ACTIVE_COMPANY_HEADER_INVALID`). A list parameter sent entirely empty (`status=`) is not an error: it is the same as omitting it. The fault is in the target, not in the content — which is what `422` is defined over. - `401`: Missing or invalid authentication. Like every other error, `message`/`detail` is localized according to `Accept-Language` (`es`, `en`, `ca`); defaults to English when the header is missing or asks for none of those. - `403`: Your account does not own or manage this company, or does not hold the required access over it. A company that does not exist answers the same way. That case answers `error.code` `ACTIVE_COMPANY_NOT_ACCESSIBLE`. - `404`: `CUSTOM_FIELD_NOT_FOUND` — this company has no custom field with this `key` in the environment of the credential. Test and Live keep separate catalogues. - `422`: A parameter parsed as its declared type but its value is not one the operation admits: a `limit` outside its range (`limit=0`, `limit=101`), a `page` under 1, a `cursor` that is not one this API issued, more keys than the `metadata` filter accepts, a value outside the supported set. The query was rejected whole and nothing was read. Where a `400` says the target could not be understood, this says it was understood and refused. Fix the value — retrying the same query answers the same way. - `429`: Rate limit exceeded. `RATE_LIMIT_EXCEEDED` when the request rate of your credential is over its limit; `TOO_MANY_REQUESTS` when an email the operation sends is held back because too many went out to that recipient in a short time. Either way, retry after the `Retry-After` seconds. `QUOTA_EXCEEDED` is the other `429`: the operation would go over a quota of your plan for the current period (issued invoices, for instance). Retrying does not help until the quota resets or the plan changes. `error.details` carries `feature_code`, `current_usage`, `quota_limit` and `reset_date`, and `RateLimit-Reset` the seconds until the reset when it is known. - `500`: Internal server error - `default`: Any status code the operation does not list above. Every operation declares it, so a generated client always has a branch to fall into and never loses the cause of a failure it did not anticipate. This is where the transport-level answers land — `405`, `406`, `415` and `429` — together with any status a future version of the API starts returning. All of them carry the same error envelope as the codes listed explicitly, so `error.code` is what tells them apart: switching on the status code alone is not enough. See «Transport-level errors» in the API description for when each one is produced. A `402` carrying `SUBSCRIPTION_REQUIRED` lands here when the account has no active subscription. `error.details` says why and what to do: `current_status` (absent if it never had one), `required_permission` and `action`. A `503` carrying `SERVICE_UNAVAILABLE` lands here too, with a `Retry-After` header: a dependency of BeeL itself (the database, the email provider) was momentarily unavailable and nothing was done. Retry after those seconds. A `502` carrying `EXTERNAL_SERVICE_ERROR` also lands here: an outbound integration the operation depends on failed or did not answer in time. It is a transient condition — retry with the same `Idempotency-Key` where the operation accepts one. One exception to the envelope: a failure of the network edge that never reaches the application (`502`, `503`, `504`, `524`) is generated by Cloudflare and its body is not BeeL's — it may not even be JSON. Treat those as "no answer", and retry. --- [API](https://skmtc.dev/beel/apis/beel-public-api.md) · [All operations](https://skmtc.dev/beel/apis/beel-public-api/llms.txt) · [OpenAPI document](https://skmtc.dev/beel/apis/beel-public-api/revisions/ffbc0ae31f79?raw)