tZERO Investments API
Investments and assets (create, update, submit, cancel, agreements).
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OpenAPI Specification
openapi: 3.2.0
info:
title: Issuance & Secondary Markets Investments API
description: APIs to Create Individual broker dealer accounts, Trigger KYC on the investors in the account, Review account information and KYC results, View Primary offering that are available to invest and manage investments in the assets.
servers:
- url: https://gateway-web-api.tzero.com/app
tags:
- name: Investments
description: Investments and assets (create, update, submit, cancel, agreements).
paths:
/pi/v1/assets:
get:
tags:
- Investments
summary: Get assets
description: Returns list of available assets.
security:
- x-api-key: []
responses:
'200':
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/AssetsResponse'
examples:
success:
summary: Example response
value:
assets:
- assetId: '39737'
symbol: AF
assetName: Abstract Face
assetDescription: ''
assetType:
code: COMMON_STOCK
label: Common Stock
description: Common Stock.
requiresAccreditation: false
pricePerShare: 10
minimumInvestment: 50
maximumInvestment: 100000
status: OPEN
offeringCloseDate: '2026-06-30T23:59:59-04:00'
offering:
code: REG_D_506C
label: Reg D 506 (c)
description: Reg D 506 (c) offering.
countries:
- US
paymentTypes:
- code: WIRE
label: WIRE
description: Wire Transfer.
'401':
description: Unauthorized
'403':
description: Forbidden
operationId: getPiV1Assets
x-operation-id-source: derived
/pi/v1/assets/{assetId}/investments:
post:
tags:
- Investments
summary: Create investment
description: 'Create a new investment for an asset.
`numberOfShares` is optional; when it is not provided investment `amount`
is used to compute the `numberOfShares`. If the shares cannot be computed or If fractional shares is not supported , the request gets rejected with `INVALID_AMOUNT_AND_SHARES`.
For Reg CF assets, regCFInvestmentTermsAccepted must be true.
Annual income and net worth are required for Reg A and Reg CF.'
operationId: createInvestment
security:
- x-api-key: []
bearerAuth: []
parameters:
- name: assetId
in: path
required: true
description: Asset identifier
schema:
type: string
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CreateInvestmentRequest'
examples:
withInvestmentAmount:
summary: Investment amount provided — numberOfShares computed automatically
value:
accountId: 1234-5678
transactionId: a0000000-0000-0000-0000-000000000001
amount: 499.51
withInvestmentAmountAndShares:
summary: Investment amount and numberOfShares provided
value:
accountId: 1234-5678
transactionId: a0000000-0000-0000-0000-000000000002
amount: 499.51
numberOfShares: 239
withInvesmentAmountAndRegCF:
summary: Reg CF asset (terms acceptance required)
value:
accountId: 1234-5678
transactionId: a0000000-0000-0000-0000-000000000003
amount: 499.51
regCFInvestmentTermsAccepted: true
responses:
'201':
description: Created
content:
application/json:
schema:
$ref: '#/components/schemas/InvestmentDetails'
example:
investmentId: inv-123
amount: 1000
numberOfShares: 1000
fundedAmount: 0
status: CREATED
assetId: '39737'
transactionId: txn-001
paymentType: WIRE
createdTs: '2025-12-11T11:30:42.534426Z'
modifiedTs: '2025-12-11T11:30:42.534426Z'
'400':
description: 'Bad Request (validation failed or invalid payload). Body: `errors` array; each item has `code`, `message`, optional `field`.
**Create investment — error codes:**
| Code | Meaning |
|------|---------|
| ACCOUNT_ID_REQUIRED | Account identifier is required. |
| TRANSACTION_ID_REQUIRED | Transaction ID is required. |
| AMOUNT_REQUIRED | Amount is required. |
| AMOUNT_INVALID | Amount must be positive. |
| NUMBER_OF_SHARES_INVALID | Number of shares must be positive when provided. |
| ASSET_NOT_OPEN | Asset is not open for investment. |
| INVALID_AMOUNT_AND_SHARES | `amount` is not a valid investment in the asset. If `details` object is available it may contain following fields `recommendedAmount`, `recommendedNumberOfShares`, and `pricePerShare`. |
| REG_CF_TERMS_NOT_ACCEPTED | Reg CF investment terms must be accepted (Reg CF assets). |
| REG_CF_TERMS_ONLY_APPLICABLE_TO_REG_CF | Reg CF terms acceptance is only applicable to Reg CF assets. |
| ANNUAL_INCOME_REQUIRED | Annual income is required for Reg A and Reg CF investments. |
| NET_WORTH_REQUIRED | Net worth is required for Reg A and Reg CF investments. |
| INVESTMENT_CREATE_ERROR | Investment could not be created. |
'
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
examples:
amountRequired:
summary: Amount required
value:
errors:
- code: AMOUNT_REQUIRED
message: Amount is required
field: amount
assetNotOpen:
summary: Asset not open
value:
errors:
- code: ASSET_NOT_OPEN
message: Cannot create investment; asset is not open for investment.
amountAndSharesMismatch:
summary: Amount and Number of Shars mismatch — recommended amounts in `details` object.
value:
errors:
- code: INVALID_AMOUNT_AND_SHARES
message: Investment amount must be adjusted to match Asset's price per share.
field: amount
details:
recommendedAmount: 499.51
recommendedNumberOfShares: 239
pricePerShare: 2.09
amountBelowMin:
summary: Investment Amount below requested minimum amount for the asset
value:
errors:
- code: INVALID_AMOUNT_AND_SHARES
message: Investment amount {2} is below the minimum required to purchase one share of the Asset.
field: amount
'401':
description: Unauthorized
'403':
description: Forbidden
'404':
description: Not Found (account or primary user)
'500':
description: Internal Server Error
put:
tags:
- Investments
summary: Update investment
description: 'Update an existing investment (amount, payment details, etc.).
Investment must belong to the account and match the asset in the path.
Payment details can also be configured via the dedicated PUT `.../payment` endpoint.
When `amount` is provided without `numberOfShares`, the amount is validated against the asset. On mismatch, a `INVALID_AMOUNT_AND_SHARES` error is returned.'
operationId: updateInvestment
security:
- x-api-key: []
bearerAuth: []
parameters:
- name: assetId
in: path
required: true
description: Asset identifier.
schema:
type: string
example: '39737'
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/UpdateInvestmentRequest'
example:
accountId: PR-1234-5678
investmentId: U7F7D95Y
transactionId: a0000000-0000-0000-0000-000000000002
amount: 1500
paymentType: ACH
bankAccountId: fia-abc-123
responses:
'200':
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/InvestmentDetails'
example:
investmentId: U7F7D95Y
amount: 1500
fundedAmount: 0
status: CREATED
assetId: '39737'
transactionId: a0000000-0000-0000-0000-000000000002
paymentType: ACH
createdTs: '2025-12-11T11:30:42.534426Z'
modifiedTs: '2025-12-11T12:00:00.000000Z'
'400':
description: 'Bad Request (validation failed or invalid payload). Body: `errors` array; each item has `code`, `message`, optional `field`.
**Update investment — error codes:**
| Code | Meaning |
|------|---------|
| ACCOUNT_ID_REQUIRED | Account identifier is required. |
| TRANSACTION_ID_REQUIRED | Transaction ID is required. |
| AMOUNT_INVALID | Amount must be positive when provided. |
| NUMBER_OF_SHARES_INVALID | Number of shares must be positive when provided. |
| INVESTMENT_UPDATE_NOT_ALLOWED | Investment update not allowed. |
| INVESTMENT_STATUS_NOT_ALLOWED_TO_UPDATE | Investment not allowed to be updated in current status. |
| ASSET_NOT_RELATED_TO_INVESTMENT | Asset is not related to the investment (path assetId mismatch). |
'
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'401':
description: Unauthorized
'403':
description: Forbidden
'404':
description: Not Found (account, primary user, or investment)
'500':
description: Internal Server Error
/pi/v1/assets/{assetId}/investments/{investmentId}/payment:
put:
tags:
- Investments
summary: Add Payment details to the investment on file
description: 'Add payment details to an existing investment. This is a separate step from
updating investment amount/shares. Only WIRE and ACH payment types are supported.
For ACH, a `bankAccountId` (linked bank account) must be provided.'
operationId: addInvestmentPayment
security:
- x-api-key: []
bearerAuth: []
parameters:
- name: assetId
in: path
required: true
description: Asset identifier.
schema:
type: string
example: '39737'
- name: investmentId
in: path
required: true
description: Investment identifier.
schema:
type: string
example: U7F7D95Y
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CreatePaymentRequest'
example:
accountId: PR-1234-5678
paymentType: ACH
bankAccountId: bank-account-uuid
transactionId: a0000000-0000-0000-0000-000000000003
responses:
'200':
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/InvestmentDetails'
example:
investmentId: U7F7D95Y
amount: 1500
fundedAmount: 0
status: CREATED
assetId: '39737'
transactionId: a0000000-0000-0000-0000-000000000003
paymentType: ACH
createdTs: '2025-12-11T11:30:42.534426Z'
modifiedTs: '2025-12-11T12:15:00.000000Z'
'400':
description: 'Bad Request (validation failed or invalid payload). Body: `errors` array; each item has `code`, `message`, optional `field`.
**Update payment — error codes:**
| Code | Meaning |
|------|---------|
| ACCOUNT_ID_REQUIRED | Account identifier is required. |
| PAYMENT_TYPE_REQUIRED | Payment type is required. |
| BANK_ACCOUNT_ID_REQUIRED | Bank account ID is required when payment type is ACH. |
| TRANSACTION_ID_REQUIRED | Transaction ID is required. |
| PAYMENT_TYPE_NOT_SUPPORTED | Payment type is not supported. Only WIRE and ACH are allowed. |
| INVESTMENT_STATUS_NOT_ALLOWED_TO_UPDATE | Investment cannot be updated in its current status (e.g. SUBMITTED). |
| PAYMENT_UPDATE_NOT_ALLOWED | Payment update not allowed (fallback code). |
| ASSET_NOT_RELATED_TO_INVESTMENT | Asset is not related to the investment (path assetId mismatch). |
'
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
examples:
paymentTypeNotSupported:
summary: Unsupported payment type
value:
errors:
- code: PAYMENT_TYPE_NOT_SUPPORTED
message: Payment type STRIPE is not supported for external API.
'401':
description: Unauthorized
'403':
description: Forbidden
'404':
description: Not Found (account, investment, or primary user)
'500':
description: Internal Server Error (INTERNAL_ERROR — unexpected error)
/pi/v1/investments/accounts/{accountId}:
get:
tags:
- Investments
summary: Get all investments for account
description: Returns all investments for the given account.
operationId: getInvestmentsByAccount
security:
- x-api-key: []
bearerAuth: []
parameters:
- name: accountId
in: path
required: true
description: Account identifier.
schema:
type: string
example: PR-1234-5678
responses:
'200':
description: OK
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/InvestmentDTO'
example:
- investmentId: U7F7D95Y
amount: 1000
numberOfShares: 100
costBasis: 1000
fundedAmount: 0
status: CREATED
assetId: '39737'
transactionId: a0000000-0000-0000-0000-000000000001
paymentType: WIRE
createdTs: '2025-12-11T11:30:42.534426Z'
modifiedTs: '2025-12-11T11:30:42.534426Z'
'401':
description: Unauthorized
'403':
description: Forbidden
'404':
description: Not Found
'500':
description: Internal Server Error
/pi/v1/investments/{investmentId}/submit:
post:
tags:
- Investments
summary: Submit investment
description: 'Submit the investment.
Payment is processed first; on success the investment is submitted.'
operationId: submitInvestment
security:
- x-api-key: []
bearerAuth: []
parameters:
- name: investmentId
in: path
required: true
description: Investment identifier.
schema:
type: string
example: U7F7D95Y
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/SubmitInvestmentRequest'
example:
accountId: PR-1234-5678
transactionId: a0000000-0000-0000-0000-000000000003
responses:
'200':
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/InvestmentDetails'
example:
investmentId: U7F7D95Y
amount: 1000
fundedAmount: 1000
status: SUBMITTED
assetId: '39737'
transactionId: a0000000-0000-0000-0000-000000000003
paymentType: WIRE
createdTs: '2025-12-11T11:30:42.534426Z'
modifiedTs: '2025-12-11T12:15:00.000000Z'
'400':
description: 'Bad Request (validation failed or invalid payload). Body: `errors` array; each item has `code`, `message`, optional `field`.
**Submit investment — error codes:**
| Code | Meaning |
|------|---------|
| ACCOUNT_ID_REQUIRED | Account identifier is required. |
| TRANSACTION_ID_REQUIRED | Transaction ID is required. |
| COUNTRY_MISMATCH | Jurisdiction is not supported; cannot proceed with payment or submission. |
| PAYMENT_SUBMISSION_FAILED | Payment could not be submitted. |
| PAYMENT_SUBMIT_ERROR | Payment submission error. |
| INVESTMENT_NOT_FOUND | Investment not found or can no longer be submitted. |
'
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'401':
description: Unauthorized
'403':
description: Forbidden
'404':
description: Not Found (account or primary user)
'500':
description: Internal Server Error
/pi/v1/investments/{investmentId}:
delete:
tags:
- Investments
summary: Cancel investment
description: Cancel an investment.
operationId: cancelInvestment
security:
- x-api-key: []
bearerAuth: []
parameters:
- name: investmentId
in: path
required: true
description: Investment identifier.
schema:
type: string
example: U7F7D95Y
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CancelInvestmentRequest'
example:
accountId: PR-1234-5678
transactionId: a0000000-0000-0000-0000-000000000004
responses:
'200':
description: OK
content:
application/json:
schema:
$ref: '#/components/schemas/InvestmentDetails'
example:
investmentId: U7F7D95Y
amount: 1000
fundedAmount: 0
status: CANCELLED
assetId: '39737'
transactionId: a0000000-0000-0000-0000-000000000004
paymentType: WIRE
createdTs: '2025-12-11T11:30:42.534426Z'
modifiedTs: '2025-12-11T12:30:00.000000Z'
'400':
description: 'Bad Request (validation failed or invalid payload). Body: `errors` array; each item has `code`, `message`, optional `field`.
**Cancel investment — error codes:**
| Code | Meaning |
|------|---------|
| ACCOUNT_ID_REQUIRED | Account identifier is required. |
| TRANSACTION_ID_REQUIRED | Transaction ID is required. |
| INVESTMENT_CANNOT_BE_CANCELLED | This investment can no longer be canceled. |
'
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
'401':
description: Unauthorized
'403':
description: Forbidden
'404':
description: Not Found (account, primary user, or investment)
'500':
description: Internal Server Error
/pi/v1/assets/{assetId}/investments/{investmentId}/agreement:
post:
tags:
- Investments
summary: Sign MSA for investment
description: 'Sign the Master Subscription Agreement for an investment.
Signature name must match the account holder''s full name.'
operationId: signInvestmentAgreement
security:
- x-api-key: []
bearerAuth: []
parameters:
- name: assetId
in: path
required: true
description: Asset identifier.
schema:
type: string
example: '39737'
- name: investmentId
in: path
required: true
description: Investment identifier.
schema:
type: string
example: U7F7D95Y
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/InvestmentSignatureRequest'
example:
accountId: PR-1234-5678
transactionId: a0000000-0000-0000-0000-000000000005
userSignature: John Doe
version: '1.0'
responses:
'200':
description: OK (investment status becomes SIGNED)
content:
application/json:
schema:
$ref: '#/components/schemas/AgreementDTO'
example:
id: 770e8400-e29b-41d4-a716-446655440002
userId: 43XSYHc0h4aU5cxMkqhIQn
assetId: '39737'
signedTs: '2025-12-11T12:20:00.000000Z'
documentId: 660e8400-e29b-41d4-a716-446655440001
status: SIGNED
expired: false
createdTs: '2025-12-11T12:20:00.000000Z'
createdBy: 43XSYHc0h4aU5cxMkqhIQn
modifiedTs: '2025-12-11T12:20:00.000000Z'
modifiedBy: 43XSYHc0h4aU5cxMkqhIQn
userSignature: John Doe
subscriptionType: STANDARD_MSA
documentVersion: '1.0'
'400':
description: 'Bad Request (validation failed or invalid payload). Body: `errors` array; each item has `code`, `message`, optional `field`.
**Sign agreement — error codes:**
| Code | Meaning |
|------|---------|
| ACCOUNT_ID_REQUIRED | Account identifier is required. |
| TRANSACTION_ID_REQUIRED | Transaction ID is required. |
| USER_SIGNATURE_REQUIRED | User signature (full name) is required. |
| USER_SIGNATURE_CANNOT_BE_BLANK | User signature cannot be blank. |
| VERSION_REQUIRED | MSA version is required. |
| VERSION_CANNOT_BE_BLANK | MSA version cannot be blank. |
| ASSET_NOT_RELATED_TO_INVESTMENT | Asset is not related to the investment (path assetId mismatch). |
| SIGNATURE_NAME_MISMATCH | Signature name must match the account holder''s name. |
'
content:
application/json:
schema:
$ref: '#/components/schemas/ErrorResponse'
examples:
signatureMismatch:
summary: Signature name mismatch
value:
errors:
- code: SIGNATURE_NAME_MISMATCH
message: Signature name must match the account holder's name.
field: userSignature
'401':
description: Unauthorized
'403':
description: Forbidden
'404':
description: Not Found (account or primary user)
'500':
description: Internal Server Error
components:
schemas:
Asset:
type: object
description: Asset details.
properties:
assetId:
type: string
description: Asset identifier (can be numeric or alphanumeric).
example: '39737'
symbol:
type:
- string
- 'null'
example: AF
assetName:
type:
- string
- 'null'
example: Abstract Face
assetDescription:
type:
- string
- 'null'
example: ''
assetType:
$ref: '#/components/schemas/CodeLabelDescription'
requiresAccreditation:
type:
- boolean
- 'null'
pricePerShare:
type:
- number
- 'null'
format: double
minimumInvestment:
type:
- number
- 'null'
format: double
maximumInvestment:
type:
- number
- 'null'
format: double
status:
type:
- string
- 'null'
example: OPEN
offeringCloseDate:
type:
- string
- 'null'
format: date-time
offering:
$ref: '#/components/schemas/CodeLabelDescription'
countries:
type: array
items:
type: string
paymentTypes:
type: array
items:
$ref: '#/components/schemas/CodeLabelDescription'
InvestmentSignatureRequest:
type: object
required:
- accountId
- transactionId
- userSignature
- version
properties:
accountId:
type: string
transactionId:
type: string
description: Client-provided id for auditing (required, non-blank).
example: a0000000-0000-0000-0000-000000000001
userSignature:
type: string
description: Full name of signer (must match account holder).
version:
type: string
description: MSA document version.
InvestmentDetails:
type: object
properties:
investmentId:
type: string
amount:
type: number
format: double
numberOfShares:
type:
- number
- 'null'
format: double
costBasis:
type:
- number
- 'null'
format: double
fundedAmount:
type:
- number
- 'null'
format: double
status:
$ref: '#/components/schemas/InvestmentStatusEnum'
assetId:
type: string
transactionId:
type:
- string
- 'null'
paymentType:
allOf:
- $ref: '#/components/schemas/PaymentTypeEnum'
createdTs:
type:
- string
- 'null'
format: date-time
modifiedTs:
type:
- string
- 'null'
format: date-time
InvestmentDTO:
description: Investment object returned in list; same shape as InvestmentDetails.
allOf:
- $ref: '#/components/schemas/InvestmentDetails'
InvestmentStatusEnum:
type: string
enum:
- CREATED
- SIGNED
- SUBMITTED
- COMPLETED
- CANCELLED
- COUNTRY_MISMATCH
- APPROVED
CreatePaymentRequest:
type: object
description: Request body for updating payment details on an investment. Only WIRE and ACH payment types are supported.
required:
- accountId
- paymentType
- transactionId
properties:
accountId:
type: string
description: Account identifier.
paymentType:
$ref: '#/components/schemas/PaymentTypeEnum'
bankAccountId:
type:
- string
- 'null'
description: Linked bank account identifier. Required when paymentType is ACH.
transactionId:
type: string
description: Client-provided id for auditing (required, non-blank).
example: a0000000-0000-0000-0000-000000000001
AssetsResponse:
type: object
required:
- assets
properties:
assets:
type: array
items:
$ref: '#/components/schemas/Asset'
UpdateInvestmentRequest:
type: object
description: Request body for updating an investment (amount, payment details).
required:
- accountId
- investmentId
- transactionId
properties:
accountId:
type: string
description: Account identifier.
investmentId:
type: string
description: Investment identifier to update.
amount:
type:
- number
- 'null'
format: double
description: Investment amount (positive if provided)
numberOfShares:
type:
- number
- 'null'
format: double
description: Number of shares (positive if provided). Can be computed from `amount` when ignored.
paymentType:
type:
- string
- 'null'
enum:
- WIRE
- ACH
description: Payment type. Only WIRE and ACH are supported.
bankAccountId:
type:
- string
- 'null'
description: Bank account ID for ACH payments. Required when paymentType is ACH. Also accepts `achAccountId`.
paymentId:
type:
- string
- 'null'
description: Payment identifier.
transactionId:
type: string
description: Client-provided id for auditing (required, non-blank).
example: a0000000-0000-0000-0000-000000000001
selfAttestedAccreditationAnswer:
type:
- boolean
- 'null'
description: Self-attested accreditation answer.
PaymentTypeEnum:
type: string
description: Supported payment types. Only WIRE and ACH are allowed.
enum:
- WIRE
- ACH
ErrorItem:
type: object
properties:
code:
type: string
description: Error/validation code (e.g. DATE_OF_BIRTH_IN_FUTURE, JURISDICTION_COUNTRY_NOT_ALLOWED). See x-businessValidationErrorCodes for business logic codes.
message:
type: string
description: Human-readable message.
field:
type:
- string
- 'null'
description: Request field path when applicable (e.g. investor.dateOfBirth, investor.physicalAddress.country).
details:
type:
- object
- 'null'
additionalProperties: true
description: 'Optional object that will be sent for certain error `code` and documented in the endpoint''s error table.
'
CancelInvestmentRequest:
type: object
required:
- accountId
- transactionId
properties:
accountId:
type: string
transactionId:
type: string
description: Client-provided id for auditing (required, non-blank).
example: a0000000-0000-0000-0000-000000000001
CodeLabelDescription:
type: object
properties:
code:
type: string
example: COMMON_STOCK
label:
type: string
example: Common Stock
description:
type:
- string
- 'null'
example: Common Stock.
SubmitInvestmentRequest:
type: object
required:
- accountId
- transactionId
properties:
accountId:
type: string
transactionId:
type: string
description: Client-provided id for auditing (required, non-blank).
example: a0000000-0000-0000-0000-000000000001
AgreementDTO:
type: object
properties:
id:
type: string
# --- truncated at 32 KB (34 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/tzero/refs/heads/main/openapi/tzero-investments-api-openapi.yml