13 deterministic agent utilities: timezone, cron, RRULE, currency, regex, diff, hashing & more.
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FREE. Convert a value between units in the same dimension: length, mass, temperature, volume, data, time, area, speed, angle, pressure, energy. Deterministic. Args: value (number), from (unit), to (unit). e.g. {value:100, from:'c', to:'f'} or {value:1, from:'GiB', to:'MB'}. Different-dimension conversions 400.
Target unit in the same dimension.
Source unit, e.g. c, km, GiB, gal, kg.
Numeric value to convert.
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FREE. Convert a value between units in the same dimension: length, mass, temperature, volume, data, time, area, speed, angle, pressure, energy. Deterministic. Args: value (number), from (unit), to (unit). e.g. {value:100, from:'c', to:'f'} or {value:1, from:'GiB', to:'MB'}. Different-dimension conversions 400.
| Argument | Type | Description |
|---|---|---|
| to* | string | Target unit in the same dimension. |
| from* | string | Source unit, e.g. c, km, GiB, gal, kg. |
| value* | number | Numeric value to convert. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"value",
"from",
"to"
],
"properties": {
"to": {
"type": "string",
"description": "Target unit in the same dimension."
},
"from": {
"type": "string",
"description": "Source unit, e.g. c, km, GiB, gal, kg."
},
"value": {
"type": "number",
"description": "Numeric value to convert."
}
},
"additionalProperties": false
}PAID $0.001. Parse a 5- or 6-field cron expression and return the next N run times plus a plain-English description. Args: expression, timezone (IANA, default UTC), count (default 5), from (ISO, optional). Without payment returns the x402 challenge; pass x_payment to settle.
| Argument | Type | Description |
|---|---|---|
| from | string | Compute runs after this ISO datetime (default now). |
| count | integer | How many upcoming runs (1-100, default 5). |
| timezone | string | IANA timezone (default UTC). |
| x_payment | string | x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first. |
| expression* | string | Cron expression, e.g. '0 9 * * 1-5'. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"expression"
],
"properties": {
"from": {
"type": "string",
"description": "Compute runs after this ISO datetime (default now)."
},
"count": {
"type": "integer",
"description": "How many upcoming runs (1-100, default 5)."
},
"timezone": {
"type": "string",
"description": "IANA timezone (default UTC)."
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
},
"expression": {
"type": "string",
"description": "Cron expression, e.g. '0 9 * * 1-5'."
}
},
"additionalProperties": false
}PAID $0.001. Convert an amount between currencies at reference/mid-market rates from a keyless public central-bank feed (ECB), cached. Informational, not a dealable quote. Args: amount, from, to (ISO-4217, e.g. USD, EUR, JPY). Without payment returns the x402 challenge; pass x_payment to settle.
| Argument | Type | Description |
|---|---|---|
| to* | string | Target ISO-4217 code, e.g. EUR. |
| from* | string | Source ISO-4217 code, e.g. USD. |
| amount* | number | Amount in the source currency. |
| x_payment | string | x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"amount",
"from",
"to"
],
"properties": {
"to": {
"type": "string",
"description": "Target ISO-4217 code, e.g. EUR."
},
"from": {
"type": "string",
"description": "Source ISO-4217 code, e.g. USD."
},
"amount": {
"type": "number",
"description": "Amount in the source currency."
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"additionalProperties": false
}PAID $0.001. Calendar date math. op='add'/'subtract' an ISO-8601 duration (P1Y2M10DT2H30M) to a date; op='diff' two datetimes into chosen units; op='business-add' add business days (configurable weekend + holidays); op='business-diff' count business days between two dates. Without payment returns the x402 challenge; pass x_payment to settle.
| Argument | Type | Description |
|---|---|---|
| op* | string | add | subtract | diff | business-add | business-diff |
| to | string | End datetime for diff/business-diff. |
| date | string | Base date for add/subtract/business-add (ISO 8601). |
| days | integer | Business days to add (business-add; may be negative). |
| from | string | Start datetime for diff/business-diff. |
| units | any | diff units, e.g. ['days','hours']. |
| weekend | array | Weekend weekdays (1=Mon..7=Sun; default [6,7]). |
| duration | any | ISO-8601 duration string or object for add/subtract. |
| holidays | array | ISO dates to skip as holidays. |
PAID $0.001. Diff two texts: a unified patch, a structured op-list (add/remove/equal), and add/remove/hunk stats. Args: a, b, mode (lines|words|chars, default lines), context (default 3), label_a, label_b. Without payment returns the x402 challenge; pass x_payment to settle.
| Argument | Type | Description |
|---|---|---|
| a* | string | Original text. |
| b* | string | Changed text. |
| mode | string | lines (default) | words | chars. |
| context | integer | Unified-diff context lines (default 3). |
| label_a | string | |
| label_b | string | |
| x_payment | string | x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"a",
"b"
],
"properties": {
"a": {
"type": "string",
"description": "Original text."
},
"b": {
"type": "string",
"description": "Changed text."
},
"mode": {
"type": "string",
"description": "lines (default) | words | chars."
},
"context": {
"type": "integer",
"description": "Unified-diff context lines (default 3)."
},
"label_a": {
"type": "string"
},
"label_b": {
"type": "string"
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"additionalProperties": false
}FREE. Encode or decode text. op is one of base64-encode|base64-decode|base64url-encode|base64url-decode|hex-encode|hex-decode|url-encode|url-decode|html-encode|html-decode. Args: op, text.
| Argument | Type | Description |
|---|---|---|
| op* | string | base64-encode|base64-decode|base64url-encode|base64url-decode|hex-encode|hex-decode|url-encode|url-decode|html-encode|html-decode |
| text* | string | Text to encode/decode. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"op",
"text"
],
"properties": {
"op": {
"type": "string",
"description": "base64-encode|base64-decode|base64url-encode|base64url-decode|hex-encode|hex-decode|url-encode|url-decode|html-encode|html-decode"
},
"text": {
"type": "string",
"description": "Text to encode/decode."
}
},
"additionalProperties": false
}FREE. Compute a cryptographic digest: sha256, sha512, sha384, sha1, md5, sha3-256, keccak256, ripemd160. Optional HMAC via hmac_key. Output hex (default), base64, or base64url. keccak256 also returns a 0x-form (handy for Ethereum). Args: algorithm, text (+ input_encoding utf8|hex|base64, output_encoding, hmac_key).
| Argument | Type | Description |
|---|---|---|
| text* | string | Input to hash. |
| hmac_key | string | If set, compute HMAC with this key (not for keccak256/sha3-256). |
| algorithm* | string | sha256 | sha512 | sha384 | sha1 | md5 | sha3-256 | keccak256 | ripemd160 |
| input_encoding | string | How `text` is encoded: utf8 (default) | hex | base64 | base64url. |
| output_encoding | string | Digest encoding: hex (default) | base64 | base64url. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"algorithm",
"text"
],
"properties": {
"text": {
"type": "string",
"description": "Input to hash."
},
"hmac_key": {
"type": "string",
"description": "If set, compute HMAC with this key (not for keccak256/sha3-256)."
},
"algorithm": {
"type": "string",
"description": "sha256 | sha512 | sha384 | sha1 | md5 | sha3-256 | keccak256 | ripemd160"
},
"input_encoding": {
"type": "string",
"description": "How `text` is encoded: utf8 (default) | hex | base64 | base64url."
},
"output_encoding": {
"type": "string",
"description": "Digest encoding: hex (default) | base64 | base64url."
}
},
"additionalProperties": false
}FREE. Generate identifiers. kind is one of uuidv4|uuidv7|ulid|nanoid|hex|base64url|int. count up to 1000. nanoid takes `size`; hex/base64url take `bytes`. Uses a CSPRNG. Args: kind, count.
| Argument | Type | Description |
|---|---|---|
| kind | string | uuidv4 (default) | uuidv7 | ulid | nanoid | hex | base64url | int |
| size | integer | nanoid length (default 21). |
| bytes | integer | hex/base64url random byte length (default 16). |
| count | integer | How many to generate (1-1000, default 1). |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"kind": {
"type": "string",
"description": "uuidv4 (default) | uuidv7 | ulid | nanoid | hex | base64url | int"
},
"size": {
"type": "integer",
"description": "nanoid length (default 21)."
},
"bytes": {
"type": "integer",
"description": "hex/base64url random byte length (default 16)."
},
"count": {
"type": "integer",
"description": "How many to generate (1-1000, default 1)."
}
},
"additionalProperties": false
}PAID $0.001. Validate a value against a JSON Schema (draft 2020-12) and explain every error in plain English (which property, what was wrong, allowed values). Args: schema (object), data (any). Without payment returns the x402 challenge; pass x_payment to settle.
| Argument | Type | Description |
|---|---|---|
| data | any | The value to validate against the schema. |
| schema* | object | A JSON Schema (draft 2020-12) object. |
| x_payment | string | x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"schema"
],
"properties": {
"data": {
"description": "The value to validate against the schema."
},
"schema": {
"type": "object",
"description": "A JSON Schema (draft 2020-12) object.",
"additionalProperties": {}
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"additionalProperties": false
}FREE. Run a regular expression against input with catastrophic-backtracking protection (it runs in a killable worker with a hard timeout, so a pathological pattern returns a 400 instead of hanging). op is test|match|extract|replace. Args: pattern, input, flags (gimsuy), op, replacement (for replace).
| Argument | Type | Description |
|---|---|---|
| op | string | test | match | extract (capture groups) | replace. Default match. |
| flags | string | Any of g,i,m,s,u,y. |
| input* | string | The text to run it against (max 200k chars). |
| limit | integer | Max matches for global ops (default 1000). |
| pattern* | string | The regular expression source (max 2000 chars). |
| replacement | string | Replacement string for op='replace' (supports $1 etc.). |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"pattern",
"input"
],
"properties": {
"op": {
"type": "string",
"description": "test | match | extract (capture groups) | replace. Default match."
},
"flags": {
"type": "string",
"description": "Any of g,i,m,s,u,y."
},
"input": {
"type": "string",
"description": "The text to run it against (max 200k chars)."
},
"limit": {
"type": "integer",
"description": "Max matches for global ops (default 1000)."
},
"pattern": {
"type": "string",
"description": "The regular expression source (max 2000 chars)."
},
"replacement": {
"type": "string",
"description": "Replacement string for op='replace' (supports $1 etc.)."
}
},
"additionalProperties": false
}PAID $0.001. Expand an iCal RRULE (RFC 5545) recurrence into its next N occurrences. Args: rrule (e.g. 'FREQ=WEEKLY;BYDAY=MO,WE;COUNT=10'), after (ISO, default now), count (default 5), timezone. Tip: include DTSTART for anchored series. Without payment returns the x402 challenge; pass x_payment.
| Argument | Type | Description |
|---|---|---|
| after | string | Return occurrences after this ISO datetime (default now). |
| count | integer | How many occurrences (1-366, default 5). |
| rrule* | string | RRULE string, optionally with a DTSTART line. |
| timezone | string | Render occurrences in this IANA zone. |
| x_payment | string | x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"rrule"
],
"properties": {
"after": {
"type": "string",
"description": "Return occurrences after this ISO datetime (default now)."
},
"count": {
"type": "integer",
"description": "How many occurrences (1-366, default 5)."
},
"rrule": {
"type": "string",
"description": "RRULE string, optionally with a DTSTART line."
},
"timezone": {
"type": "string",
"description": "Render occurrences in this IANA zone."
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"additionalProperties": false
}FREE. Text transforms. op='slugify' -> URL slug; op is one of camel|pascal|snake|kebab|constant|dot|path|title|sentence|upper|lower for case conversion; op='template' fills {{placeholders}} from `data`. Args: op, text (for slugify/case), or template + data (for template).
| Argument | Type | Description |
|---|---|---|
| op* | string | slugify | template | camel | pascal | snake | kebab | constant | dot | path | title | sentence | upper | lower |
| data | object | Object of values for op='template'. |
| text | string | Input text for slugify/case ops. |
| strict | boolean | template: throw on missing keys. |
| template | string | Template string for op='template', with {{key}} placeholders. |
| separator | string | Slug separator (default '-'). |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"op"
],
"properties": {
"op": {
"type": "string",
"description": "slugify | template | camel | pascal | snake | kebab | constant | dot | path | title | sentence | upper | lower"
},
"data": {
"type": "object",
"description": "Object of values for op='template'.",
"additionalProperties": {}
},
"text": {
"type": "string",
"description": "Input text for slugify/case ops."
},
"strict": {
"type": "boolean",
"description": "template: throw on missing keys."
},
"template": {
"type": "string",
"description": "Template string for op='template', with {{key}} placeholders."
},
"separator": {
"type": "string",
"description": "Slug separator (default '-')."
}
},
"additionalProperties": false
}PAID $0.001 (x402, USDC on Base). Convert an instant between IANA time zones with historically-correct DST. Returns converted datetime, UTC offsets, tz abbreviations, DST flags, and the offset difference. Args: datetime (ISO 8601 or epoch), from_zone, to_zone. Without payment returns the x402 challenge; pass x_payment to settle. Free teaser exists on the HTTP API at /v1/timezone/free.
| Argument | Type | Description |
|---|---|---|
| to_zone* | string | Target IANA zone, e.g. Europe/London, Asia/Tokyo. |
| datetime* | string | number | Instant to convert: ISO 8601 (e.g. 2021-03-14T01:30:00) or epoch seconds/millis. |
| from_zone | string | Source IANA zone (default UTC), e.g. America/New_York. |
| x_payment | string | x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"datetime",
"to_zone"
],
"properties": {
"to_zone": {
"type": "string",
"description": "Target IANA zone, e.g. Europe/London, Asia/Tokyo."
},
"datetime": {
"type": [
"string",
"number"
],
"description": "Instant to convert: ISO 8601 (e.g. 2021-03-14T01:30:00) or epoch seconds/millis."
},
"from_zone": {
"type": "string",
"description": "Source IANA zone (default UTC), e.g. America/New_York."
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"additionalProperties": false
}| timezone | string | IANA zone for parsing/rendering. |
| x_payment | string | x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"op"
],
"properties": {
"op": {
"type": "string",
"description": "add | subtract | diff | business-add | business-diff"
},
"to": {
"type": "string",
"description": "End datetime for diff/business-diff."
},
"date": {
"type": "string",
"description": "Base date for add/subtract/business-add (ISO 8601)."
},
"days": {
"type": "integer",
"description": "Business days to add (business-add; may be negative)."
},
"from": {
"type": "string",
"description": "Start datetime for diff/business-diff."
},
"units": {
"anyOf": [
{
"type": "string"
},
{
"type": "array",
"items": {
"type": "string"
}
}
],
"description": "diff units, e.g. ['days','hours']."
},
"weekend": {
"type": "array",
"items": {
"type": "number"
},
"description": "Weekend weekdays (1=Mon..7=Sun; default [6,7])."
},
"duration": {
"anyOf": [
{
"type": "string"
},
{
"type": "object",
"additionalProperties": {}
}
],
"description": "ISO-8601 duration string or object for add/subtract."
},
"holidays": {
"type": "array",
"items": {
"type": "string"
},
"description": "ISO dates to skip as holidays."
},
"timezone": {
"type": "string",
"description": "IANA zone for parsing/rendering."
},
"x_payment": {
"type": "string",
"description": "x402 payment payload (base64) for this PAID tool. If supplied it is forwarded as the X-PAYMENT header to settle the $0.001 call and return the real result instead of a 402 challenge. Omit to get the price challenge first."
}
},
"additionalProperties": false
}