WritersLogic Verifiable AI Agent Hub Spend Ledger API
The Spend Ledger API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for spend ledger.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-spend-ledger-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Spend Ledger API
version: 2.0.0
description: Pay-per-call agents settled in USDC on Base via x402. Every response carries a signed provenance envelope.
contact:
name: WritersLogic
url: https://writerslogic.com/agents
email: agents@writerslogic.com
servers:
- url: https://agents.writerslogic.com
tags:
- name: Spend Ledger
paths:
/api/v1/spend-ledger:
post:
operationId: spend_ledger
summary: 'Spend ledger with reservations: one budget for a tree of agents'
description: 'A budget shared by a task tree, in integer minor units. reserve() atomically holds an amount if the remaining budget covers it (expired holds are freed automatically); commit() records what was actually spent, up to the hold; release() frees a hold. These are real reservations, not a snapshot: two workers cannot both reserve the last dollar. It records spending; it does not move money.
Price: 0.005 USDC on Base (x402).'
x-x402-price-usdc: '0.005'
x-x402-amount: '5000'
x-payment-info:
protocols:
- x402
price:
mode: fixed
currency: USD
amount: '0.005'
x-audience: agent-infra
x-sample-url: https://agents.writerslogic.com/api/v1/samples/spend-ledger
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- op
- ledger
properties:
op:
type: string
enum:
- open
- reserve
- commit
- release
- status
ledger:
type: string
pattern: ^[A-Za-z0-9_.:/@+-]{1,200}$
description: Ledger name, e.g. task:research-42.
currency:
type: string
pattern: ^[A-Z0-9]{2,12}$
description: 'open: currency or token code, e.g. USD or USDC.'
budgetMinor:
type: integer
minimum: 0
maximum: 1000000000000000
description: 'open: total budget in minor units.'
reservationId:
type: string
pattern: ^[A-Za-z0-9_.:-]{1,128}$
amountMinor:
type: integer
minimum: 0
maximum: 1000000000000000
description: 'reserve: amount to hold. commit: amount actually spent (at most the hold).'
ttlSeconds:
type: integer
minimum: 1
maximum: 86400
description: 'reserve: hold lifetime; default 600.'
tenantId:
type: string
pattern: ^[A-Za-z0-9_.-]{1,64}$
description: 'Required for API-key callers (namespaced as key:<tenantId>; keep it unguessable). Ignored when a wallet paid: the payer address is the tenant.'
requestId:
type: string
pattern: ^[A-Za-z0-9_.:-]{1,128}$
description: 'Caller-chosen id for this mutation. A retry with the same id and same input returns the stored response (24 h) instead of applying twice; the same id with different input is rejected. Send one on every mutation you may retry: without it a retry is applied again (fleet-memory record appends a duplicate; a repeated spend-ledger commit or release answers NO_HOLD because the first call already took effect).'
example:
op: reserve
ledger: task:research-42
reservationId: subagent-3-call-1
amountMinor: 250
requestId: sa3-r1
responses:
'200':
description: Paid result with provenance
content:
application/json:
schema:
type: object
properties:
data:
type: object
properties:
status:
type: string
enum:
- pass
- fail
- unknown
- unsupported
description: 'pass: every rule held. fail: a rule was violated (see witnesses). unknown: the input lacks the evidence to decide. unsupported: outside what this engine covers. Missing evidence is never a pass.'
op:
type: string
currency:
anyOf:
- type: string
- type: 'null'
budgetMinor:
anyOf:
- type: integer
- type: 'null'
committedMinor:
anyOf:
- type: integer
- type: 'null'
reservedMinor:
anyOf:
- type: integer
description: Sum of live holds.
- type: 'null'
description: Sum of live holds.
availableMinor:
anyOf:
- type: integer
- type: 'null'
reservation:
anyOf:
- type: object
properties:
id:
type: string
amountMinor:
type: integer
expiresAt:
type: string
- type: 'null'
witnesses:
type: array
items:
type: object
properties:
ruleId:
type: string
detail:
type: string
path:
type: string
description: JSON pointer or dotted path into the input.
offset:
type: integer
index:
type: integer
expected:
description: What the rule required.
actual:
description: What the input had.
versions:
type: object
description: Every semantic dependency of this answer (engine, tables and their as-of dates, tokenizer, calendar, rounding profile).
limits:
type: array
items:
type: string
deterministic:
type: boolean
description: 'Always true: pure code, no model.'
_provenance:
type: object
description: C2PA-aligned manifest and W3C VC 2.0 (eddsa-jcs-2022) issued by the hub DID; verify at POST /api/v1/verify-provenance
required:
- data
- _provenance
'400':
description: Invalid request (no payment consumed)
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
'401':
description: Invalid X-API-KEY
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
'402':
description: Payment required or invalid
content:
application/json:
schema:
type: object
description: x402 v2 PaymentRequired (also base64 in the PAYMENT-REQUIRED header)
properties:
x402Version:
type: integer
error:
type: string
code:
type: string
resource:
type: object
accepts:
type: array
items:
type: object
extensions:
type: object
'502':
description: Upstream failure; the payment is released or not settled
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
tags:
- Spend Ledger
components:
securitySchemes:
x402:
type: apiKey
in: header
name: PAYMENT-SIGNATURE
description: x402 v2 payment payload (base64) sent after a 402 challenge
apiKey:
type: apiKey
in: header
name: X-API-KEY