> ## Documentation Index > Fetch the complete documentation index at: https://docs.formo.so/llms.txt > Use this file to discover all available pages before exploring further. # Update Chart > Update an existing chart on a dashboard board. Modify the chart query, type, title, or visualization settings through the Formo API. ## OpenAPI ````yaml PUT /v0/boards/{boardId}/charts/{chartId} openapi: 3.1.0 info: title: Formo Public API description: >- REST API for managing Formo projects, analytics, alerts, boards, charts, contracts, segments, and AI chat. **Auth.** Every endpoint on `api.formo.so` requires a workspace API key with the appropriate scopes (see `x-api-scopes`). The one exception is `POST /v0/raw_events`, which runs on `events.formo.so` and authenticates with the project SDK write key instead. **Response shape.** Successful responses return the resource directly (or `{ data: [...], total, page, size, has_more }` for paginated lists). HTTP status carries success/failure; there is no envelope wrapping success bodies. **Errors.** Non-2xx responses from `api.formo.so` use the `Error` envelope, with two exceptions: some rate-limit rejections reply in plain text, and `POST /v0/raw_events` returns a plain `{ "error": "..." }` object. Treat the HTTP status as authoritative and parse defensively: `{ error: { code, message, doc_url, param?, details? } }`. Branch on the machine-readable `code` (see `ErrorCode` enum) and follow `doc_url` to the matching section of the [errors reference](https://docs.formo.so/api/errors). **Idempotency.** Pass an `Idempotency-Key` header on write requests to alerts, boards, charts, contracts, segments, and import to make retries safe; the response is cached for 24 h and replayed on duplicate keys. Profile writes and `POST /v0/query` do not support it. version: 0.1.0 contact: name: Formo url: https://formo.so servers: - url: https://api.formo.so description: API Server (boards, alerts, contracts, segments, profiles, query, import) - url: https://events.formo.so description: Events Server (event ingestion) security: - WorkspaceApiKey: [] tags: - name: Alerts description: Manage project alerts and notifications - name: Boards description: Manage dashboard boards - name: Charts description: Manage charts within boards - name: Contracts description: Manage blockchain contract monitoring - name: Segments description: Manage user segments - name: Profiles description: Wallet profiles and import - name: Query description: >- Execute SQL queries and call pre-built analytics endpoints (KPIs, top pages, lifecycle, retention, revenue). Requires the query:read scope. - name: Events description: Event ingestion API (events.formo.so) paths: /v0/boards/{boardId}/charts/{chartId}: put: tags: - Charts summary: Edit chart operationId: editChart parameters: - name: boardId in: path required: true schema: type: string - name: chartId in: path required: true schema: type: string - $ref: '#/components/parameters/IdempotencyKey' requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/UpdateChartRequest' responses: '200': description: Chart updated content: application/json: schema: type: string description: Chart ID '400': $ref: '#/components/responses/BadRequest' '409': $ref: '#/components/responses/Conflict' components: parameters: IdempotencyKey: name: Idempotency-Key in: header required: false schema: type: string maxLength: 255 description: >- Optional unique value (e.g. a UUID v4) that lets you safely retry POST/PUT/PATCH/DELETE requests. The first request runs normally; subsequent requests with the same key replay the stored response (status + body) for 24 hours, so retries can never double-create or double-charge. Two concurrent requests with the same key return `409 IDEMPOTENCY_IN_PROGRESS`. Generate a fresh key per logical operation. schemas: UpdateChartRequest: type: object description: Request body for updating an existing chart. properties: chartId: type: string description: ID of the chart to update. projectId: type: string description: Project the chart belongs to. query: type: string minLength: 1 description: >- SQL query that powers the chart. - **`funnel`**: pass `"SELECT 1"`; the actual query is auto-generated from `steps`. - **`user_paths`**: omit it; the query is generated from `settings.anchors`. - **`retention`**: omit it; data is fetched automatically. - **All other types**: required; must be a valid SQL string. chart_type: type: string enum: - table - number - funnel - bar - line - area - pie - stacked - user_paths - retention description: >- Visualization type. Determines which other fields are required: | `chart_type` | Extra required fields | |---|---| | `table` | `query` | | `number` | `query` (must return 1 row × 1 column) | | `bar` | `query`, `x_axis`, `y_axis` (≥ 1) | | `line` | `query`, `x_axis`, `y_axis` (≥ 1) | | `area` | `query`, `x_axis`, `y_axis` (≥ 1; exactly 1 if `group_by` set) | | `pie` | `query`, `y_axis` (exactly 1) | | `stacked` | `query`, `x_axis`, `y_axis` (exactly 1), `group_by` | | `funnel` | `steps` (≥ 2), `query` placeholder `"SELECT 1"` | | `user_paths` | `settings.anchors` (≥ 1); query is generated | | `retention` | `settings.entryFilter` (key required; `null` means any event) | title: type: string minLength: 1 description: Display name shown on the chart and board. description: type: string description: Optional description. x_axis: type: string description: >- Column name for the X axis. Required for `bar`, `line`, and `stacked`. y_axis: type: array items: type: string description: |- Column name(s) used as Y axis metrics. - `bar` / `line`: at least 1 element required. - `pie` / `stacked`: exactly 1 element required. group_by: type: string description: Column to group / stack series by. Required for `stacked`. steps: type: array items: $ref: '#/components/schemas/FunnelStep' minItems: 2 description: >- Ordered list of funnel steps. Required for `funnel` (minimum 2 steps). Each element is a `FunnelStep`; add property predicates in its canonical `filters` array (e.g. `"filters": [{ "field": "rdns", "op": "eq", "value": "io.metamask" }]`). settings: $ref: '#/components/schemas/ChartSettings' required: - chartId - projectId - chart_type - title FunnelStep: type: object description: >- A single funnel or user-path step. Event-property predicates are stored in `filters`, using the same canonical `{field, op, value}` envelope as every other filter surface. Funnel steps (not user-path anchors or retention filters) may also carry `events`, an OR group: the step then matches any listed event. `type`/`event` stay the step's primary event and are always part of the group; `filters` apply to the whole group. properties: type: type: string enum: - event - track - decoded_log description: >- `event`: built-in page/connect/transaction events; `track`: custom tracked events; `decoded_log`: decoded smart-contract events. event: type: string minLength: 1 description: >- Event name (e.g. `page`, `connect`, `transaction`, or a custom track event name). events: type: array maxItems: 10 items: $ref: '#/components/schemas/FunnelStepEvent' description: >- Optional OR group (funnel steps only, max 10). When present and non-empty the step matches any of these events, e.g. `[{"type":"track","event":"Swap Initiated"},{"type":"track","event":"Limit Order Placed"}]`. The primary `type`/`event` is always included. filters: type: array items: $ref: '#/components/schemas/StepFilterCondition' required: - type - event additionalProperties: true ChartSettings: type: object description: >- Chart-type-specific configuration. The fields that apply depend on `chart_type`: - **funnel**: `funnelType`, `conversionWindow`, `breakdown` - **user_paths**: `anchors`, `maxSteps`, `nodesPerStep`, `conversionWindow`, `filters` - **retention**: `entryFilter`, `retentionFilter`, `retentionUserFilters`, `retentionSignalType`, `retentionLabelSignal` Fields are optional at the schema level except where the selected chart type requires them. User Paths require at least one `anchors` entry. Retention requests must explicitly include `entryFilter`; use `null` for any event. properties: funnelType: type: string enum: - closed - open default: closed description: >- **Funnel only.** `closed`: users must complete steps in strict order with no intervening events. `open`: users may complete steps in order but other events may occur between steps. conversionWindow: $ref: '#/components/schemas/ConversionWindow' description: >- **Funnel & user_paths.** Maximum time from Step 1 for a user to complete all steps. breakdown: type: string enum: - device - browser - os - location - referrer - ref - utm_source - utm_medium - utm_campaign - utm_term - utm_content - builder_codes description: >- **Funnel only.** Split each funnel bar by this dimension. The top categories are shown individually; the rest are collapsed into 'Others'. anchors: type: array minItems: 1 items: $ref: '#/components/schemas/FunnelStep' description: >- **user_paths (required).** Ordered path anchors. The first entry starts the flow; the last entry ends it. A single entry creates an open-ended flow. maxSteps: type: integer minimum: 2 maximum: 5 default: 3 description: >- **user_paths.** Maximum number of steps to show in the flow (2 to 5). Values above 5 are clamped to 5. nodesPerStep: type: integer minimum: 2 maximum: 8 default: 5 description: >- **user_paths.** Maximum number of unique event nodes visible per step (2 to 8). Values above 8 are clamped to 8. filters: type: string description: >- **user_paths.** JSON-encoded string of additional filters applied to the path query. retentionFilter: oneOf: - $ref: '#/components/schemas/FunnelStep' - type: 'null' description: >- **retention.** Event that qualifies a returning visit as 'retained'. If `null`, any event counts as a return. entryFilter: oneOf: - $ref: '#/components/schemas/FunnelStep' - type: 'null' description: >- **retention (required).** Event that places a user into the cohort. If `null`, any event counts as cohort entry. The key must be present even when its value is `null`. retentionUserFilters: type: array items: $ref: '#/components/schemas/RetentionUserFilter' description: >- **retention.** Zero or more user-segment filters that narrow the cohort (e.g. only desktop users, only users from a specific UTM source). retentionSignalType: type: string enum: - event - label default: event description: >- **retention.** `event` (default): cohort and retention are driven by events. `label`: driven by a label value over time (see `retentionLabelSignal`); when `label`, the event fields are ignored. retentionLabelSignal: $ref: '#/components/schemas/RetentionLabelSignal' description: >- **retention.** The label predicate when `retentionSignalType` is `label`. retentionCohortLabelFilters: type: array description: '**retention.** Label predicates that restrict an event-based cohort.' items: $ref: '#/components/schemas/RetentionCohortLabelFilter' Error: type: object description: >- Standard error envelope returned by every public API endpoint for any non-2xx response. The HTTP status code carries success/failure; the body provides a machine-readable `code`, a human-readable `message`, and a `doc_url` pointing at the matching section of the docs so agents can fetch context on the fly. properties: error: type: object required: - code - message - doc_url properties: code: $ref: '#/components/schemas/ErrorCode' message: type: string description: >- Human-readable error description. Wording may change between releases, so branch on `code`, not `message`. doc_url: type: string format: uri description: >- Link to the matching section of the errors reference at https://docs.formo.so/api/errors. param: type: string description: >- When the error pertains to a specific request field, the dotted path to that field (e.g. `body.trigger_filters.0.value`). details: type: object additionalProperties: true description: >- Code-specific extra context. For `INVALID_VALIDATION_REQUEST` this is a `{ fieldPath: message }` map of every Zod validation failure. required: - error FunnelStepEvent: type: object description: >- One alternative inside a funnel step's OR group. `filters` uses the same canonical `{field, op, value}` envelope as `FunnelStep.filters` and binds to this member only: `(A AND filtersA) OR (B AND filtersB)`. properties: type: type: string enum: - event - track - decoded_log event: type: string minLength: 1 filters: type: array items: $ref: '#/components/schemas/StepFilterCondition' description: Member-scoped predicates, AND-joined within this member. required: - type - event StepFilterCondition: type: object description: A canonical filter on a funnel, flow, retention, or user-path step. properties: field: type: string description: Column or property targeted by this filter. op: type: string enum: - eq - neq - gt - lt - gte - lte - in - nin - startsWith - endsWith - contains - notEmpty - isEmpty description: Canonical comparison operator token. value: oneOf: - type: string - type: number - type: boolean - type: array minItems: 1 items: oneOf: - type: string pattern: ^[^|]*$ - type: number - type: 'null' description: >- Value to compare against. Omit for `notEmpty` and `isEmpty`. For `in` / `nin`, pass a non-empty array or a pipe-delimited string. Array string members cannot contain a literal `|`, which is reserved as the Tinybird membership separator. required: - field - op ConversionWindow: type: object description: >- Time window within which a user must complete all funnel steps (measured from Step 1). Defaults to 2 hours if omitted. properties: value: type: integer minimum: 1 description: Number of time units. unit: type: string enum: - hour - day - week description: Time unit. `week` = 7 days. required: - value - unit RetentionUserFilter: type: object description: >- A user-level retention cohort filter using the canonical `{field, op, value}` envelope. properties: value: oneOf: - type: string - type: number description: The value to compare against. Omit for `notEmpty` and `isEmpty`. field: type: string description: >- The user property to filter on (e.g. `device`, `browser`, `os`, `location`, `utm_source`, `utm_medium`, `utm_campaign`). op: type: string enum: - eq - neq - in - nin - gt - gte - lt - lte - notEmpty - isEmpty description: >- Comparison operator. Only the canonical terse tokens are accepted (the retired long forms `greater`/`greaterOrEqual`/`less`/`lessOrEqual` are rejected). `notEmpty` ("is not empty") and `isEmpty` ("is empty") are value-less existence checks on a string user property; the `value` is ignored. Substring operators (`startsWith` / `endsWith` / `contains`) are not supported on retention user filters. required: - field - op RetentionLabelSignal: type: object description: >- The label predicate for label-based retention. The cohort is wallets grouped by the week they FIRST crossed this predicate on their label value; a wallet is retained in a later week if its latest value as of that week's end still satisfies it (as-of / carry-forward, evaluated against label history). properties: field: type: string description: >- The label tag to evaluate (the value of `tag_id` set via `POST /v0/profiles/:address/labels`). op: type: string enum: - gt - gte - lt - lte - eq default: gt description: >- Comparison operator. Numeric operators coerce both sides via toFloat64OrZero, so a numeric op on a non-numeric value yields no match (not an error). value: type: string description: >- The threshold/value to compare against. Always a string; numeric ops coerce it. chain_id: type: string default: '' description: Optional chain scope. Empty string matches across all chains. required: - field - op - value RetentionCohortLabelFilter: type: object description: >- A label predicate that restricts an event-based retention cohort. Uses the canonical filter envelope. properties: field: type: string description: The label tag to evaluate. op: type: string enum: - eq - neq - contains - gt - gte - lt - lte default: eq value: type: string chain_id: type: string default: '' description: Optional chain scope. Empty string matches across all chains. required: - field - op - value ErrorCode: type: string description: >- Stable, enumerated error codes. New codes may be added in any release; clients should treat unknown codes as the closest matching HTTP status family. enum: - INTERNAL_SERVER_ERROR - INVALID_VALIDATION_REQUEST - UNAUTHORIZED - BAD_REQUEST - FORBIDDEN - NOT_FOUND - CONFLICT - INVALID_CHAIN_ID - CONTEXT_LIMIT_EXCEEDED - SERVICE_UNAVAILABLE - TOO_MANY_REQUESTS - IDEMPOTENCY_IN_PROGRESS - INVALID_IDEMPOTENCY_KEY responses: BadRequest: description: >- The request was rejected. `code` is either `INVALID_VALIDATION_REQUEST` (Zod schema mismatch; `details` carries a `{ fieldPath: message }` map) or `BAD_REQUEST` (semantic validation failure outside Zod, e.g. mismatched IDs, business-rule violations). Branch on `code`, not status, to tell the two apart. content: application/json: schema: $ref: '#/components/schemas/Error' examples: validation: summary: Zod schema mismatch value: error: code: INVALID_VALIDATION_REQUEST message: Invalid request data doc_url: https://docs.formo.so/api/errors#invalid_validation_request details: body.name: String must contain at least 1 character(s) semantic: summary: Semantic validation failure value: error: code: BAD_REQUEST message: Target board must be different from the current board doc_url: https://docs.formo.so/api/errors#bad_request Conflict: description: >- The request conflicts with current resource state, or an `Idempotency-Key` request with the same key is currently in flight. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: IDEMPOTENCY_IN_PROGRESS message: >- A request with this Idempotency-Key is already in progress. Retry shortly. doc_url: https://docs.formo.so/api/errors#idempotency_in_progress securitySchemes: WorkspaceApiKey: type: http scheme: bearer description: >- Workspace API key (e.g. `formo_xxx`). Create one in the Formo dashboard under Team Settings > API. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.