CustomFields API
Tenant-defined fields attached to contacts and conversations Base path:/api/v1/custom-fields
Endpoint count: 9
title: “Errors worth branching on” description: “Per-endpoint failure templates matching the envelope — what actually fires, what to retry, what to surface to the operator.”
Errors worth branching on
These five failures cover the custom-field create (POST /api/v1/custom-fields), which every form-builder save flows through. Each block below is a full{ error, meta } envelope as the API returns it, and the matrix at the bottom answers retry vs surface for the same five classes. For the platform-wide decision table these branches plug into, see the error handling guide.
401 — Unauthorized
401 on this page is the bearer key failing before the route ran — it never means the resource is wrong. Rotate the key or re-mint the scoped token; retrying the same request changes nothing.
403 — Forbidden
403 means the key authenticated but the operation is gated by scope — check the key’s scopes on the developer page; a 403 is never a data-not-found shape.
422 — Schema
422 means the payload did not match the request schema — branch on error.details.field and resend with an allowed name (letters/digits/hyphens/underscores) instead of blind-retrying the same body.
429 — Rate
Retry-After header and error.details.retry_after are both set on every 429 — resend the SAME request after the lower of the two.
409 — Conflict
60-second retry matrix
List custom field definitions
GET /api/v1/custom-fieldsstring (enum: true|false)
Sandbox opt-in for Clerk-session-authenticated requests. Set to
true to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response meta.test_mode: true. Ignored for live API keys (dv_live_sk_*) — server-to-server clients must use a test-prefixed key (dv_test_sk_*) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header.Get a custom field definition
GET /api/v1/custom-fields/{id}string
required
—
string (enum: true|false)
Sandbox opt-in for Clerk-session-authenticated requests. Set to
true to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response meta.test_mode: true. Ignored for live API keys (dv_live_sk_*) — server-to-server clients must use a test-prefixed key (dv_test_sk_*) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header.Scan dependents (segments / campaigns / flows / contacts)
GET /api/v1/custom-fields/{id}/dependenciesstring
required
—
string (enum: true|false)
Sandbox opt-in for Clerk-session-authenticated requests. Set to
true to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response meta.test_mode: true. Ignored for live API keys (dv_live_sk_*) — server-to-server clients must use a test-prefixed key (dv_test_sk_*) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header.Schema-explorer payload: definition + usage counts + last-10 PII-redacted sample values
GET /api/v1/custom-fields/{id}/explorerstring
required
—
string (enum: true|false)
Sandbox opt-in for Clerk-session-authenticated requests. Set to
true to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response meta.test_mode: true. Ignored for live API keys (dv_live_sk_*) — server-to-server clients must use a test-prefixed key (dv_test_sk_*) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header.Create a custom field definition
POST /api/v1/custom-fieldsstring
Stripe-style idempotency token. Pass a stable, client-generated value (1-255 chars) to dedupe retries on transient timeouts. The same key+credential+path replays the original response for 24h on 2xx (5min on 4xx, 30s on 5xx). Returns 409 if a concurrent request with the same key is already in flight; replayed responses include the
Idempotency-Replay: true response header.string (enum: true|false)
Sandbox opt-in for Clerk-session-authenticated requests. Set to
true to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response meta.test_mode: true. Ignored for live API keys (dv_live_sk_*) — server-to-server clients must use a test-prefixed key (dv_test_sk_*) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header.Reorder custom field definitions
POST /api/v1/custom-fields/reorderstring
Stripe-style idempotency token. Pass a stable, client-generated value (1-255 chars) to dedupe retries on transient timeouts. The same key+credential+path replays the original response for 24h on 2xx (5min on 4xx, 30s on 5xx). Returns 409 if a concurrent request with the same key is already in flight; replayed responses include the
Idempotency-Replay: true response header.string (enum: true|false)
Sandbox opt-in for Clerk-session-authenticated requests. Set to
true to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response meta.test_mode: true. Ignored for live API keys (dv_live_sk_*) — server-to-server clients must use a test-prefixed key (dv_test_sk_*) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header.string[]
required
Custom-field definition ids in the desired top-to-bottom display order (1–500 ids). Unknown ids are ignored and any definitions omitted from the list keep their current order.
Set a custom-field value on a contact
PUT /api/v1/custom-fields/valuesstring
Stripe-style idempotency token. Pass a stable, client-generated value (1-255 chars) to dedupe retries on transient timeouts. The same key+credential+path replays the original response for 24h on 2xx (5min on 4xx, 30s on 5xx). Returns 409 if a concurrent request with the same key is already in flight; replayed responses include the
Idempotency-Replay: true response header.string (enum: true|false)
Sandbox opt-in for Clerk-session-authenticated requests. Set to
true to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response meta.test_mode: true. Ignored for live API keys (dv_live_sk_*) — server-to-server clients must use a test-prefixed key (dv_test_sk_*) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header.string
required
Id of the contact whose custom-field value is being set (1–128 characters).
string
required
Machine
key of the custom-field definition to write, in snake_case (up to 40 characters).string | number | boolean | string[] | null
required
Value to store for this field. Its JSON type must match the field’s declared
type — a string for text / select, a number for number, a boolean for boolean, an ISO-8601 string for date, or an array of strings for multiselect.Update a custom field definition
PATCH /api/v1/custom-fields/{id}string
required
—
string (enum: true|false)
Sandbox opt-in for Clerk-session-authenticated requests. Set to
true to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response meta.test_mode: true. Ignored for live API keys (dv_live_sk_*) — server-to-server clients must use a test-prefixed key (dv_test_sk_*) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header.Delete a custom field definition
DELETE /api/v1/custom-fields/{id}string
required
—
string (enum: true|false)
Sandbox opt-in for Clerk-session-authenticated requests. Set to
true to route the call through the test-mode pipeline: no real provider delivery, no credits deducted, response meta.test_mode: true. Ignored for live API keys (dv_live_sk_*) — server-to-server clients must use a test-prefixed key (dv_test_sk_*) to exercise sandbox. Test-prefixed keys unconditionally enable sandbox regardless of this header.204 No Content