Skip to main content
POST
Post a batched daily interest accrual for a program

Authorizations

Authorization
string
header
required

OAuth2 JWT bearer tokens. Tokens are validated at API Gateway via a Lambda Authorizer that verifies signature against the issuer's JWKS, checks iss, aud, exp, nbf, and the tenant_id custom claim. Granular scopes are required per operation.

Headers

Idempotency-Key
string
required

Required on every POST. Must be a deterministic, client-chosen identifier unique per tenant. Recommended format: <event_type>:<resource_id>:<natural_key>. Retained for 24h minimum.

Required string length: 8 - 255
Pattern: ^[A-Za-z0-9][A-Za-z0-9._:\-]{7,254}$
Example:

"payment:loan_42:proc_txn_abc123"

X-Trace-Id
string

Deprecated — use traceparent instead (ADR-0011). Client-supplied correlation ID. Accepted until 2026-10-01 for backward compatibility; will be removed after that date.

Pattern: ^[A-Za-z0-9\-]{8,128}$
traceparent
string

W3C Trace Context traceparent header for distributed tracing (RFC 7230). When present, the service extracts the parent span context and creates child spans under it, enabling end-to-end trace correlation across API Gateway, the service, and the database. Format: 00-<trace-id>-<parent-id>-<flags>

Pattern: ^00-[0-9a-f]{32}-[0-9a-f]{16}-[0-9a-f]{2}$
Example:

"00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-01"

tracestate
string

W3C Trace Context tracestate header. Carries vendor-specific trace metadata (e.g. AWS X-Ray sampling decision). Passed through unchanged.

Body

application/json
program_id
string<uuid>
required
Pattern: ^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$
Example:

"11111111-1111-1111-1111-111111111111"

accrual_date
string<date>
required
day_count_convention
enum<string>
required
Available options:
ACT_365,
ACT_360,
30_360
loans
object[]
required
Required array length: 1 - 100000 elements

Response

Idempotency replay.

accrual_event_id
string<uuid>
required
Pattern: ^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$
Example:

"11111111-1111-1111-1111-111111111111"

journal_entry_id
string<uuid>
required
Pattern: ^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$
Example:

"11111111-1111-1111-1111-111111111111"

loan_count
integer
required
Required range: x >= 1
total_accrued_minor
string
required

Non-negative integer amount in the currency's minor unit, serialized as a string to preserve precision (JS numbers cannot safely represent values above 2^53). BIGINT on the wire, BIGINT in the database.

Required string length: 1 - 19
Pattern: ^(0|[1-9][0-9]{0,18})$
Examples:

"88849"

"10000000"

posted_at
string<date-time>
required

RFC 3339 timestamp, UTC.