> ## Documentation Index > Fetch the complete documentation index at: https://hevninc.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > HEVN has two products and they authorize money differently. Self-serve (the General tab): the person who owns the email holds the only key and signs for themselves. Whitelabel (the Whitelabel and REST API tabs): the integrator's backend holds a developer key, signs on behalf of client accounts it created, and HEVN co-signs. Never mix the two models in an answer. > Use HEVN's terms exactly. A rail is a bank route a client can request. A virtual account (bnk_) is an opened rail. Account details are what a payer needs in order to wire money, and arrive in a field named requisites. A client is an account the integrator created; the business behind it is the integrator's customer. A contact is a saved destination; a beneficiary is the party at the far end of a fiat payout. Every departure of money is a payout, to a bank account or to a wallet alike. > Never name a banking partner. Say 'a licensed banking partner'. > There are no published fee rates, spreads or minimums. Prices come from a quote on a specific payment; direct pricing questions to HEVN rather than inventing numbers. > The whitelabel API is at /dapi/v1 and takes a developer-key session plus an X-Hevn-Account header. The CLI uses an app API key in X-Api-Key. They are different credentials and neither works on the other surface. # Fill the typed fields read off a document > The verification gate refuses a submission whose documents have no recognised fields. Write them here — the keys are the paths the refusal names in `details.documents`, without the slot prefix. ## OpenAPI ````yaml /openapi.json put /documents/{documentId}/content openapi: 3.1.0 info: title: HEVN Platform API description: >- HEVN's account, verification and money-movement API. Verification follows a submission workflow: save applicant info and documents, inspect outstanding requirements, then explicitly complete the submission to send an immutable snapshot for review. Completing a submission is separate from editing it. version: 1.0.0 servers: [] security: [] tags: - name: auth description: Authenticate an integration and issue short-lived account sessions. - name: accounts description: Create and manage business or individual customer accounts. - name: verification description: >- Collect business-applicant and related-individual information, inspect requirements, and complete a verification submission for review. - name: documents description: Upload verification and payment evidence for later reference by id. - name: virtual accounts description: Discover payment methods and create persistent receiving account details. - name: transfers description: Quote, create, authorize and track incoming or outgoing transfers. - name: contacts description: Create saved contacts and inspect their available payment channels. - name: transactions description: Read and export the account ledger. - name: escrow description: Create, authorize and reconcile on-chain escrow agreements. - name: sandbox description: Emulate funding and lifecycle events in the sandbox environment. paths: /documents/{documentId}/content: put: tags: - documents summary: Fill the typed fields read off a document description: >- The verification gate refuses a submission whose documents have no recognised fields. Write them here — the keys are the paths the refusal names in `details.documents`, without the slot prefix. operationId: write_document_content_documents__documentId__content_put parameters: - name: documentId in: path required: true schema: type: string description: Prefixed document id title: Documentid description: Prefixed document id - name: Idempotency-Key in: header required: false schema: anyOf: - type: string - type: 'null' description: >- Your own key for this write, `^[A-Za-z0-9._:-]{1,128}$`. A retry with the same key replays the first answer; the same key with a different request is refused. examples: - po-inv-2026-114 title: Idempotency-Key description: >- Your own key for this write, `^[A-Za-z0-9._:-]{1,128}$`. A retry with the same key replays the first answer; the same key with a different request is refused. - name: X-Hevn-Account in: header required: false schema: anyOf: - type: string - type: 'null' description: >- The client account to act for, as a `cl_…` id. Omit it to act as yourself. examples: - cl_9f2c1ab84d7e4f1fa3c65b0e7d9a2c41 title: X-Hevn-Account description: >- The client account to act for, as a `cl_…` id. Omit it to act as yourself. - name: x-api-key in: header required: false schema: anyOf: - type: string - type: 'null' title: X-Api-Key requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/DocumentContentRequest' responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/DocumentResponse' '422': description: Request validation failed content: application/json: schema: $ref: '#/components/schemas/PlatformErrorResponse' security: - HTTPBearer: [] components: schemas: DocumentContentRequest: properties: fields: additionalProperties: $ref: '#/components/schemas/JsonValue' type: object title: Fields description: Typed values extracted from or supplied for the document. additionalProperties: false type: object required: - fields title: DocumentContentRequest DocumentResponse: properties: id: type: string pattern: ^(?:doc_)?[A-Za-z0-9._:\-]{1,216}$ title: Id description: Stable public identifier for this document. examples: - doc_9f2c1ab84d7e4f1fa3c65b0e7d9a2c41 slot: $ref: '#/components/schemas/DocumentType' description: Verification requirement this document satisfies. name: anyOf: - type: string - type: 'null' title: Name description: Human-readable document name. fileName: anyOf: - type: string - type: 'null' title: Filename description: Original file name including its extension. createdAt: anyOf: - type: string format: date-time - type: 'null' title: Createdat description: UTC timestamp when the document was created. type: object required: - id - slot title: DocumentResponse PlatformErrorResponse: properties: error: $ref: '#/components/schemas/PlatformErrorBody' description: Public error body. type: object required: - error title: PlatformErrorResponse JsonValue: {} DocumentType: type: string enum: - certificate_of_incorporation - formation_document - articles_of_incorporation - power_of_attorney - corporate_structure - company_registry_extract - corporate_registry_extract - shareholder_registry - director_structure - proof_of_address - utility_bill - aml_policy - annual_financial_statements - articles_of_association - audit_report - bank_reference_letter - bank_statement - banking_details - birth_certificate - business_license - business_plan - certificate_of_good_standing - crypto_statement - credit_report - criminal_record_check - cv_resume - driving_license - education_certificate - financial_projections - investment_statement - insurance_policy - lease_agreement - list_of_authorized_signatories - marriage_certificate - national_id - operating_agreement - partnership_agreement - professional_license - regulatory_license - reference_letter - register_of_members - residence_permit - shareholding_structure - shareholders_agreement - social_security_document - source_of_funds_declaration - tax_identification_document - tax_compliance_form - tax_returns - payslip - pitch_deck - savings_statement - trade_references - vat_registration - vendor_contracts - visa - wealth_statement - contract - invoice - loan_agreement - subscription_agreement - safe_agreement - convertible_note - promissory_note - marketing_material - employment_contract - authorization_to_act - authority_to_bind - ubo_declaration - income_verification_letter - source_of_funds - source_of_wealth - supporting_document - memorandum - passport_front - passport_back - id_card_front - id_card_back - drivers_license_front - drivers_license_back - residence_permit_front - residence_permit_back - other title: DocumentType PlatformErrorBody: properties: code: $ref: '#/components/schemas/PlatformErrorCode' description: Stable machine-readable error code. message: type: string title: Message description: Human-readable explanation safe to show to an end user. details: anyOf: - additionalProperties: true type: object - type: 'null' title: Details description: Structured context for this error, when available. type: object required: - code - message title: PlatformErrorBody PlatformErrorCode: type: string enum: - invalid_request - validation_failed - invalid_cursor - invalid_id - idempotency_key_invalid - idempotency_key_reused - unauthenticated - token_expired - forbidden - not_found - method_not_allowed - conflict - gone - payload_too_large - rate_limited - provider_unavailable - database_unavailable - internal_error - invalid_credentials - request_expired - challenge_not_found - challenge_consumed - challenge_expired - signature_invalid - key_not_registered - signer_not_attached - wallet_not_linked - approval_consumed - approval_expired - approval_mismatch - signing_policy_refused - login_unavailable - login_mode_unavailable - developer_key_not_found - developer_key_already_exists - account_header_invalid - account_scope_conflict - account_not_found - account_forbidden - account_read_only - account_not_controlled - contact_not_found - quote_not_submitted - quote_not_fundable - funding_mode_unsupported - funding_token_unsupported - insufficient_funds - smart_wallet_not_deployed - wallet_owner_unverified - already_funded - payment_slot_consumed - funding_in_progress - funding_attempt_expired - contact_changed - user_operation_rejected - user_operation_unavailable - integrator_inactive - client_creation_not_enabled - email_in_use - name_in_use - client_request_conflict - client_not_found - profile_locked - contact_not_payable - contact_chain_unsupported - contact_token_unsupported - contact_payment_details_invalid - amount_below_minimum - amount_above_maximum - amount_precision_unsupported - payout_not_found - payout_not_fundable - quote_expired - bundler_rejected - bundler_unavailable - contact_details_invalid - contact_in_use - kyb_incomplete - kyb_roster_conflict - kyb_subject_conflict - document_fields_missing - document_not_found - document_type_unsupported - invalid_enum_value - entity_not_found - escrow_not_found - escrow_action_not_found - escrow_not_operated_by_you - escrow_state_changed - action_in_flight - simulation_failed - stale_nonce - amount_out_of_range - amount_not_allowed - window_closed - token_not_supported - receiver_not_a_client - rail_not_found - rail_not_available - rail_requirements_unmet - phone_required - payin_not_available - payin_expired - payin_not_found - transaction_not_found title: PlatformErrorCode securitySchemes: HTTPBearer: type: http scheme: bearer ````