WritersLogic Verifiable AI Agent Hub Tolerance Stack API
The Tolerance Stack API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for tolerance stack.
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curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-tolerance-stack-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Tolerance Stack 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: Tolerance Stack
paths:
/api/v1/tolerance-stack:
post:
operationId: tolerance_stack
summary: One-dimensional tolerance stack-up (worst-case and RSS)
description: 'Computes the minimum and maximum of a linear dimensional stack (the gap) from signed contributions with symmetric, unequal-bilateral, unilateral or min/max limits, both by exact worst-case arithmetic and by root-sum-square, names the dominant contributor and tests the gap against a required minimum and/or maximum. For mechanical designers and agents checking clearances. It does not do 2D or 3D stacks, GD&T material-condition bonus or datum shift, thermal growth or distribution fitting. The RSS result assumes independent, centred, normal dimensions and is labelled as an assumption.
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/tolerance-stack
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required:
- dimensions
properties:
unit:
type: string
maxLength: 16
description: Label for the single unit all numbers share (not converted).
dimensions:
type: array
items:
type: object
properties:
name:
type: string
maxLength: 80
description: Label used in witnesses.
nominal:
type: number
description: Nominal size.
minimum: -1000000000
maximum: 1000000000
tol:
type: number
description: Symmetric bilateral tolerance (nominal ± tol).
minimum: 0
maximum: 1000000000
plus:
type: number
description: Upper deviation magnitude.
minimum: 0
maximum: 1000000000
minus:
type: number
description: Lower deviation magnitude.
minimum: 0
maximum: 1000000000
min:
type: number
description: Smallest allowed size (limits form, with max).
minimum: -1000000000
maximum: 1000000000
max:
type: number
description: Largest allowed size (limits form, with min).
minimum: -1000000000
maximum: 1000000000
sign:
type: integer
enum:
- 1
- -1
description: +1 adds the dimension to the gap (default), -1 subtracts it.
maxItems: 100
minItems: 1
description: 'At most 100. Give nominal with tol, or nominal with plus and/or minus (unilateral: one of them), or min and max.'
requirement:
type: object
properties:
min:
type: number
description: Gap must be at least this.
minimum: -1000000000
maximum: 1000000000
max:
type: number
description: Gap must be at most this.
minimum: -1000000000
maximum: 1000000000
description: Allowed gap range.
method:
type: string
enum:
- worst-case
- rss
description: Which result decides status against the requirement (default worst-case). Both are always reported.
sigmaLevel:
type: number
description: 'RSS: each tolerance is this many sigma (default 3).'
minimum: 0.5
maximum: 10
reportSigma:
type: number
description: 'RSS: report the gap at this many sigma (default equals sigmaLevel).'
minimum: 0.5
maximum: 10
example:
unit: mm
dimensions:
- name: housing bore
nominal: 50
plus: 0.1
minus: 0
- name: bearing A
nominal: 20
tol: 0.05
sign: -1
- name: spacer
nominal: 29.5
tol: 0.1
sign: -1
requirement:
min: 0.1
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.'
unit:
type: string
nominalGap:
type: number
worstCase:
type: object
properties:
min:
type: number
max:
type: number
plusTolerance:
type: number
minusTolerance:
type: number
rss:
type: object
properties:
mean:
type: number
min:
type: number
max:
type: number
halfRange:
type: number
assumptions:
type: string
method:
type: string
margin:
anyOf:
- type: number
description: Distance from the deciding result to the nearest requirement limit; negative when violated; null without a requirement.
- type: 'null'
contributors:
type: array
items:
type: object
properties:
name:
type: string
halfRange:
type: number
worstCaseSharePct:
anyOf:
- type: number
- type: 'null'
rssSharePct:
anyOf:
- type: number
- type: 'null'
dominant:
anyOf:
- type: string
description: Name of the contributor with the largest half-range, or null when all are zero.
- 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:
- Tolerance Stack
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