WritersLogic Verifiable AI Agent Hub Dice Roll API
The Dice Roll API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for dice roll.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-dice-roll-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Dice Roll 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: Dice Roll
paths:
/api/v1/dice-roll:
post:
operationId: dice_roll
summary: Verifiable dice roll from a seed, with a re-derivable transcript
description: 'Rolls dice notation (for example 4d6kh3+2) from a caller seed with a documented SHA-256 counter-mode stream and returns every die, the kept/dropped marks and a full draw transcript, for agents and referees that need a roll anyone can re-derive. Optionally checks a claimed total or claimed faces against the re-derived roll. Does NOT provide unpredictable randomness: the seed is public input, so anyone who knows it knows the outcome; do not use it for gambling or security. Exploding dice, rerolls, success counting, d% and fudge dice return unsupported.
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: business
x-sample-url: https://agents.writerslogic.com/api/v1/samples/dice-roll
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- notation
- seed
properties:
notation:
type: string
maxLength: 200
description: 'Dice notation: terms of NdM (N 1-100, M 2-1000) or integers joined by + and -; optional kh/kl/dh/dl with a count on a group. At most 20 groups and 1000 dice.'
minLength: 1
seed:
type: string
maxLength: 200
description: 'Caller seed string. Public: the outcome is a pure function of notation and seed.'
minLength: 1
expectTotal:
type: integer
description: Optional claimed total to verify.
minimum: -100000000
maximum: 100000000
expectRolls:
type: array
items:
type: integer
description: A claimed face.
minimum: 1
maximum: 1000
maxItems: 1000
description: Optional claimed faces in notation order, before keep/drop marks.
includeTranscript:
type: boolean
description: Default true. False drops blocks and draws (the transcript digest stays).
example:
notation: 4d6kh3+2
seed: campaign-7/session-3/roll-12
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.'
notation:
type: string
maxLength: 200
description: Canonical notation (or the input when unsupported).
total:
type: integer
rolls:
type: array
items:
type: integer
maxItems: 1000
description: Every die face, in notation order.
groups:
type: array
items:
type: object
properties:
term:
type: integer
description: Index of the term in the notation.
notation:
type: string
rolls:
type: array
items:
type: integer
kept:
type: array
items:
type: boolean
description: Same length as rolls; false for dice removed by a keep/drop modifier.
subtotal:
type: integer
description: Signed contribution to the total.
constants:
type: integer
description: Sum of the integer terms.
rejectedWords:
type: integer
description: Words discarded by rejection sampling.
transcriptSha256:
type: string
description: SHA-256 of the JCS-canonical draws array.
blocks:
type: array
items:
type: object
properties:
counter:
type: integer
digest:
type: string
draws:
type: array
items:
type: object
properties:
i:
type: integer
description: Word index in the stream.
block:
type: integer
description: Counter of the SHA-256 block holding the word.
word:
type: integer
description: Big-endian uint32.
rejected:
type: boolean
term:
type: integer
face:
type: integer
description: Absent when the word was rejected.
algorithm:
type: string
description: The exact stream and sampling algorithm.
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:
- Dice Roll
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