> ## Documentation Index > Fetch the complete documentation index at: https://docs.herondata.io/llms.txt > Use this file to discover all available pages before exploring further. # Create a single rule > Create a new rule to send a 'end_user.review_required' webhook after processing if rule condition evaluates to true ## OpenAPI ````yaml https://app.herondata.io/swagger post /api/rules/ openapi: 3.0.0 info: contact: email: support@herondata.io name: Support title: Heron Data API version: '2021-07-19' servers: - description: Production url: https://app.herondata.io security: - ApiKeyAuth: - key_XXX externalDocs: description: Read Tutorial url: https://docs.herondata.io/ paths: /api/rules/: post: tags: - Rules summary: Create a single rule description: > Create a new rule to send a 'end_user.review_required' webhook after processing if rule condition evaluates to true requestBody: content: application/json: schema: properties: rule: $ref: '#/components/schemas/Rule' type: object required: true responses: '201': content: application/json: schema: properties: rule: $ref: '#/components/schemas/Rule' type: object description: OK security: - ApiKeyAuth: [] components: schemas: Rule: properties: condition: description: Key for how to compare metric value to rule value enum: - equal - not_equal - greater_than - greater_than_or_equal - less_than - less_than_or_equal - contains example: equal type: string created: description: When the rule was created in Heron system example: '2026-05-15T19:46:22.754975' format: date-time readOnly: true type: string date_range: description: Date range corresponding to metric enum: - latest - last_30_days - last_90_days - last_120_days - last_180_days - last_365_days - next_30_days - next_60_days - next_90_days - next_180_days - last_1_calendar_months - last_3_calendar_months - last_4_calendar_months - last_6_calendar_months - last_12_calendar_months - last_15_calendar_months - last_24_calendar_months - last_1_full_calendar_months - last_2_full_calendar_months - last_3_full_calendar_months - last_6_full_calendar_months - last_12_full_calendar_months - last_60_days - last_45_days - last_2_calendar_months example: last_180_days type: string group: description: >- Used to display rules by the stage in the underwriting workflow to which they apply. enum: - data_quality_datasource - data_quality_account - data_quality_transaction - null example: data_quality_datasource nullable: true type: string heron_id: description: Unique id for rule generated by Heron example: rul_U4Z7vYkDy5xtRZDbnMTALa readOnly: true type: string last_updated: description: When the rule was last updated in Heron system example: '2026-06-26T19:46:22.755016' format: date-time readOnly: true type: string metric_label: description: Label corresponding to metric enum: - data_volume - date_range - date_range_with_data_sources - data_freshness - has_balance_ratio - data_coverage - accounts - potentially_duplicated_account_pairs - category_coverage - inflows - outflows - deposit_days - net_amount - inflow_monthly_avg_amount - inflow_amount - inflow_growth_rate - merchant_coverage - confidence - revenue_anomalies - last_debt_investment - last_debt_investment_days - merchant_heron_ids - distinct_mcas - distinct_mcas_from_outflows - distinct_mcas_from_inflows - latest_largest_mca_funding_amount - min_revenue_count_per_statement_ignoring_savings_and_loc_accounts - max_negative_balance_days_per_statement - min_total_revenue_per_statement - max_low_balance_days_per_statement - min_average_daily_balance_per_statement - has_unreconciled_data - revenue_daily_average - cogs_daily_average - opex_daily_average - debt_repayment_daily_average - debt_investment - debt_investors - nsf_fees - nsf_days - inflow_daily_average - average_monthly_revenue_sources - debt_investment_count - debt_collection - tax_payments - tax_payment_amount - unconnected_account_ratio - outflow_daily_average - revenue_sources - atm_withdrawals - revenue - annualized_revenue - cogs - average_credit_card_spend - opex - revenue_profit_and_loss - annualized_revenue_profit_and_loss - cogs_profit_and_loss - opex_profit_and_loss - revenue_monthly_average - number_months_revenue_less_monthly_target - min_number_of_revenue_deposits - debt_repayment - revenue_growth_rate - category_debt_repayment_count - category_other_expenses_count - category_revenue_count - category_postage_count - category_debt_investment_count - category_atm_cash_outflows_count - category_rent_count - insurance_in_out_ratio - rent_in_out_ratio - taxes_in_out_ratio - travel_in_out_ratio - company_investments_in_out_ratio - atm_cash_outflows_in_out_ratio - overdraft_nsf_fees_in_out_ratio - reconciled_intra_company_transfers_to_insurance_ratio - insurance_to_general_payment_ratio - insurance_to_advertising_ratio - insurance_to_credit_card_ratio - insurance_to_check_deposits_ratio - insurance_to_atm_cash_inflows_ratio - insurance_to_debt_repayment_ratio - insurance_to_charges_fees_ratio - insurance_to_travel_ratio - insurance_to_inventory_ratio - insurance_to_none_ratio - equity_investment_to_advertising_ratio - equity_investment_to_debt_repayment_ratio - equity_investment_to_charges_fees_ratio - equity_investment_to_unreconciled_intra_company_transfers_ratio - equity_investment_to_travel_ratio - equity_investment_to_company_investments_ratio - general_payment_to_credit_card_ratio - general_payment_to_p2p_transfers_ratio - general_payment_to_company_investments_ratio - general_payment_to_none_ratio - debt_investment_to_overdraft_nsf_fees_ratio - debt_investment_to_other_expenses_ratio - debt_investment_to_none_ratio - advertising_to_p2p_transfers_ratio - advertising_to_other_expenses_ratio - credit_card_to_check_deposits_ratio - credit_card_to_charges_fees_ratio - credit_card_to_travel_ratio - credit_card_to_inventory_ratio - credit_card_to_revenue_ratio - credit_card_to_payroll_and_consultants_ratio - credit_card_to_none_ratio - rent_to_check_deposits_ratio - rent_to_postage_ratio - rent_to_special_outflows_ratio - rent_to_travel_ratio - rent_to_p2p_transfers_ratio - rent_to_payroll_and_consultants_ratio - check_deposits_to_debt_repayment_ratio - check_deposits_to_postage_ratio - check_deposits_to_unreconciled_intra_company_transfers_ratio - check_deposits_to_revenue_ratio - special_inflows_to_charges_fees_ratio - special_inflows_to_utilities_ratio - special_inflows_to_unreconciled_intra_company_transfers_ratio - special_inflows_to_travel_ratio - special_inflows_to_revenue_ratio - special_inflows_to_atm_cash_outflows_ratio - special_inflows_to_payroll_and_consultants_ratio - refunds_to_atm_cash_inflows_ratio - refunds_to_charges_fees_ratio - refunds_to_utilities_ratio - refunds_to_unreconciled_intra_company_transfers_ratio - refunds_to_travel_ratio - refunds_to_overdraft_nsf_fees_ratio - refunds_to_atm_cash_outflows_ratio - atm_cash_inflows_to_charges_fees_ratio - atm_cash_inflows_to_utilities_ratio - atm_cash_inflows_to_unreconciled_intra_company_transfers_ratio - atm_cash_inflows_to_atm_cash_outflows_ratio - atm_cash_inflows_to_other_expenses_ratio - debt_repayment_to_taxes_ratio - debt_repayment_to_postage_ratio - debt_repayment_to_special_outflows_ratio - debt_repayment_to_atm_cash_outflows_ratio - debt_repayment_to_payroll_and_consultants_ratio - check_outflows_to_charges_fees_ratio - check_outflows_to_utilities_ratio - check_outflows_to_travel_ratio - check_outflows_to_p2p_transfers_ratio - check_outflows_to_revenue_ratio - check_outflows_to_other_expenses_ratio - check_outflows_to_payroll_and_consultants_ratio - taxes_to_travel_ratio - taxes_to_p2p_transfers_ratio - taxes_to_revenue_ratio - taxes_to_atm_cash_outflows_ratio - taxes_to_other_expenses_ratio - taxes_to_payroll_and_consultants_ratio - charges_fees_to_postage_ratio - charges_fees_to_overdraft_nsf_fees_ratio - charges_fees_to_revenue_ratio - charges_fees_to_company_investments_ratio - charges_fees_to_other_expenses_ratio - charges_fees_to_none_ratio - utilities_to_postage_ratio - utilities_to_special_outflows_ratio - utilities_to_travel_ratio - utilities_to_overdraft_nsf_fees_ratio - utilities_to_other_expenses_ratio - postage_to_unreconciled_intra_company_transfers_ratio - postage_to_p2p_transfers_ratio - postage_to_none_ratio - unreconciled_intra_company_transfers_to_travel_ratio - unreconciled_intra_company_transfers_to_p2p_transfers_ratio - unreconciled_intra_company_transfers_to_atm_cash_outflows_ratio - unreconciled_intra_company_transfers_to_other_expenses_ratio - special_outflows_to_p2p_transfers_ratio - special_outflows_to_atm_cash_outflows_ratio - travel_to_p2p_transfers_ratio - travel_to_inventory_ratio - travel_to_other_expenses_ratio - travel_to_payroll_and_consultants_ratio - travel_to_none_ratio - p2p_transfers_to_overdraft_nsf_fees_ratio - p2p_transfers_to_atm_cash_outflows_ratio - inventory_to_overdraft_nsf_fees_ratio - inventory_to_company_investments_ratio - inventory_to_atm_cash_outflows_ratio - inventory_to_other_expenses_ratio - overdraft_nsf_fees_to_other_expenses_ratio - revenue_to_payroll_and_consultants_ratio - latest_balance - balance_minimum - balance_maximum - balance_average - change_in_balance - negative_balance_days - negative_balance_days_by_account - mean_balance_velocity - mean_abs_balance_velocity - weekday_balance_average - weekday_with_highest_avg - weekday_with_lowest_avg - gross_operating_cashflow_daily_average - net_operating_cashflow_daily_average - gross_operating_cashflow - net_operating_cashflow - gross_operating_cashflow_profit_and_loss - net_operating_cashflow_profit_and_loss - net_operating_cashflow_monthly_average - debt_service_coverage_ratio - predicted_nsf_fees - predicted_balance_daily_average - heron_score example: unique_transactions type: string name: description: >- Description of rule. Sent with webhook response, so can be used as a reference to the rule example: notify_if_debt_investment_count_gt_0_last_180d maxLength: 140 nullable: true type: string selector: additionalProperties: {} description: >- key-value pairs of the desired selector that should select whichend users to apply this rule. They are evaluated as an AND condition(all must be true to run this rule for an end user). Leave empty toapply to all end users. example: is_portfolio: true type: object value: description: >- Numeric value to compare to a metric; use this when the threshold is numeric example: 42.42 nullable: true type: number value_str: description: >- String value to compare to a metric; use this when the threshold is a string example: mrc_12345678ijwdd321d921 nullable: true type: string type: object securitySchemes: ApiKeyAuth: in: header name: x-api-key type: apiKey ````