X Preflight
X Preflight: read a draft post against X's open-sourced ranking code. Returns what is already settled before you post, whether it enters the pool strangers are drawn from, how long it stays retrievable, which filters delete it, and which gates nobody can know in advance. Every claim cites a file and line in X's published source. Never writes the post. Nothing stored.
Not tested: has real-world effectsour last check, 2026-09-24
0 of 0checks answered this week
n/amedian answer time
$0.01listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://kevinhoff.com/api/paid/grade
| Category | Code and developer |
|---|---|
| Provider host | kevinhoff.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 9 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"text": "the draft post you are about to publish on x.com"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"all_video_over_10s": {
"description": "OPTIONAL, defaults to false. Whether EVERY attachment is video running longer than ten seconds. One photo or one short clip makes this false.",
"type": "boolean"
},
"brief": {
"description": "OPTIONAL, defaults to false. True returns the classification only and drops the prose, which is 78% of the generation. Answers in seconds instead of tens of seconds, same model and same price. Use it if your client has a short timeout.",
"type": "boolean"
},
"followers_under_1000": {
"description": "OPTIONAL, defaults to false. Whether the author is under the small-account cap that the one per-batch lift applies to.",
"type": "boolean"
},
"post_kind": {
"description": "OPTIONAL, defaults to original. A reply's parent is not in the text, so no tool can read this off the draft. Declare it only if it is not an original.",
"enum": [
"original",
"reply",
"quote",
"repost"
],
"type": "string"
},
"reader_follows_back": {
"description": "OPTIONAL, defaults to false. Whether the reader follows the author back. Decides in-network versus out-of-network, which changes the reply chain.",
"type": "boolean"
},
"text": {
"description": "The draft post. Never rewritten, never stored.",
"type": "string"
}
},
"required": [
"text"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"gates": {
"description": "The eight gates in the order X runs them, each with a state and the source line it is read from.",
"items": {
"properties": {
"head": {
"type": "string"
},
"n": {
"type": "number"
},
"name": {
"type": "string"
},
"src": {
"type": "string"
},
"state": {
"enum": [
"go",
"stop",
"open",
"call"
],
"type": "string"
}
},
"required": [
"n",
"state",
"src"
],
"type": "object"
},
"type": "array"
},
"model": {
"description": "The paid half: the read of the draft itself.",
"type": "object"
},
"structural": {
"description": "Consequences that need no model: branches in X's published source.",
"items": {
"properties": {
"detail": {
"type": "string"
},
"fact": {
"type": "string"
},
"src": {
"type": "string"
}
},
"required": [
"fact",
"src"
],
"type": "object"
},
"type": "array"
}
},
"required": [
"gates",
"structural",
"model"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}