The Lossy Conversion API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for lossy conversion.
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openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Lossy Conversion 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: Lossy Conversion
paths:
/api/v1/lossy-conversion:
post:
operationId: lossy_conversion
summary: Does this value survive conversion to another numeric or spreadsheet type?
description: 'Takes raw JSON literals (as written, so 9007199254740993, 1e400, -0, "007" and 0.10 are judged on their digits, not on a parsed double) and target types (binary64, binary32, int8..int64, uint8..uint64, PostgreSQL numeric(p,s), Arrow decimal128/decimal256, Parquet decimal, Excel cell, pandas int64) and reports for each pair whether the value is exact, lossy (rounded, truncated, leading zeros or sign of zero lost, 15-digit Excel limit, date or formula coercion) or overflows, with the rule and the converted value. Also diagnoses identifier mangling: give before/after strings and it names what happened (leading zeros stripped, scientific notation, 15-digit rounding, date coercion, trimming, NFC/NFKC change, truncation). For agents moving data between JSON, databases, dataframes and spreadsheets. It does not parse files and does not convert; the converted value shown is what the target would hold.
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: developer
x-sample-url: https://agents.writerslogic.com/api/v1/samples/lossy-conversion
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
required: []
properties:
samples:
type: array
maxItems: 200
items:
type: string
maxLength: 400
description: Raw JSON scalar literals exactly as written, e.g. 9007199254740993, "007", 1e400, 0.10, null.
targets:
type: array
maxItems: 12
items:
type: string
maxLength: 40
description: 'Target types: float64, float32, int8, int16, int32, int64, uint8, uint16, uint32, uint64, numeric(p,s), decimal128(p,s), decimal256(p,s), parquet-decimal(p,s), excel-number, pandas-int64.'
pairs:
type: array
maxItems: 200
items:
type: object
properties:
before:
type: string
maxLength: 400
after:
type: string
maxLength: 400
required:
- before
- after
additionalProperties: false
description: Identifier or text values before and after a round trip through another system.
example:
samples:
- '9007199254740993'
- '"007"'
- '0.1'
- 1e400
targets:
- float64
- int64
- numeric(5,2)
- excel-number
pairs:
- before: 00123456789012345678
after: '1.23457E+17'
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.'
conversions:
type: array
items:
type: object
properties:
sample:
type: string
target:
type: string
verdict:
type: string
enum:
- exact
- lossy
- overflow
- invalid
rule:
type: string
detail:
type: string
converted:
anyOf:
- type: string
- type: 'null'
description: What the target holds, as text; null when it cannot be stored.
mangling:
type: array
items:
type: object
properties:
index:
type: integer
before:
type: string
after:
type: string
changed:
type: boolean
rules:
type: array
items:
type: object
properties:
rule:
type: string
detail:
type: string
summary:
type: object
properties:
exact:
type: integer
lossy:
type: integer
overflow:
type: integer
invalid:
type: integer
changedPairs:
type: integer
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:
- Lossy Conversion
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