flexyield-io Keys API
The Keys API from flexyield-io — 3 operation(s) for keys.
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OpenAPI Specification
openapi: 3.2.0
info:
title: FlexYield Keys API
version: 1.0.0
description: 'One API key, one bill, every provider. JSON-RPC relay across 6 chains, the toolbox, the data API and account statements. Weighted metering (standard 1 · heavy 2 · data 10 · toolbox 1 · cache hit 0); every error carries data.request_id and data.support. Agents: the same capabilities are MCP tools at https://flexyield.io/mcp.'
contact:
email: hello@flexyield.io
url: https://flexyield.io/support
termsOfService: https://flexyield.io/terms
servers:
- url: https://flexyield.io
tags:
- name: Keys
paths:
/keys:
post:
summary: 'Door 1: an anonymous capability key, no input — public supply, 10,000 weighted…'
security: []
responses:
'201':
description: 'The key (shown once) plus the welcome: door, fences, doorways (bind, adopt with claim_code, pay per call), terms version'
content:
application/json:
schema:
type: object
properties:
key:
type: string
door:
type: string
fences:
type: object
doorways:
type: object
'429':
description: Address quota for new keys used up — the body carries the doorways
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
tags:
- Keys
operationId: postKeys
x-operation-id-source: derived
/keys/bind/start:
post:
summary: 'Door 2, step 1: a SIWE message to sign with the wallet that will own this key'
security:
- bearer: []
requestBody:
required: true
content:
application/json:
schema:
type: object
required:
- address
properties:
address:
type: string
pattern: ^0x[0-9a-fA-F]{40}$
responses:
'200':
description: message_to_sign and expires_in_seconds
content:
application/json:
schema:
type: object
'422':
description: Bad address or key already bound
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Invalid or missing API key (-32001)
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
tags:
- Keys
operationId: postKeysBindStart
x-operation-id-source: derived
/keys/bind:
post:
summary: 'Door 2, step 2: bind the key to the wallet — persistent identity, 1M…'
security:
- bearer: []
requestBody:
required: true
content:
application/json:
schema:
type: object
required:
- address
- signature
properties:
address:
type: string
signature:
type: string
responses:
'200':
description: 'bound: true plus the welcome'
content:
application/json:
schema:
type: object
'422':
description: Signature or nonce invalid
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'401':
description: Invalid or missing API key (-32001)
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
tags:
- Keys
operationId: postKeysBind
x-operation-id-source: derived
components:
schemas:
Error:
type: object
properties:
error:
type: object
properties:
code:
type: integer
description: JSON-RPC style code, e.g. -32005 rate window
message:
type: string
data:
type: object
properties:
request_id:
type: string
format: uuid
support:
type: string
description: Path to file this call as a ticket
securitySchemes:
bearer:
type: http
scheme: bearer
description: Your FlexYield API key (fy_…). Free tier at https://flexyield.io/registration/new
x402:
type: apiKey
in: header
name: X-PAYMENT
description: 'x402 lane: the one-time credential (fyx_…) returned by POST https://flexyield.io/x402/redeem after a payment against the menu at https://flexyield.io/x402 (base); the redeem needs an EIP-191 signature by the paying wallet — the tx hash alone is public and is not a credential'
externalDocs:
url: https://flexyield.io/docs
description: Developer docs
x-pricing:
rule: 'Price per unit falls with commitment, never with identity: more volume committed per month → lower USD per 1M units; yearly < monthly; per call is the dearest lane; no pack undercuts the yearly tier; a subscription is cheapest per unit at its included volume.'
unit: USD per 1,000,000 standard units (standard 1 · heavy 2 · data 10 · cache hit 0), net — VAT is added where it applies on every lane, incl. per call (by the payer's location)
tierMultipliers:
cheap: 0.5
balanced: 1.0
fast: 2.0
lanes:
- key: scale_yearly
label: Scale (yearly)
kind: subscription
commitmentUsd: 2990.0
priceUsd: 249.17
units: 60000000
usdPerMillionUnits: 4.15
supply: premium
fastShare: 0.25
live: true
- key: growth_yearly
label: Growth (yearly)
kind: subscription
commitmentUsd: 8990.0
priceUsd: 749.17
units: 200000000
usdPerMillionUnits: 3.75
supply: premium
fastShare: 0.2
live: true
- key: pro_yearly
label: Pro (yearly)
kind: subscription
commitmentUsd: 990.0
priceUsd: 82.5
units: 15000000
usdPerMillionUnits: 5.5
supply: premium
fastShare: 0.3
live: true
- key: scale_monthly
label: Scale
kind: subscription
commitmentUsd: 299.0
priceUsd: 299.0
units: 60000000
usdPerMillionUnits: 4.98
supply: premium
fastShare: 0.25
live: true
- key: growth_monthly
label: Growth
kind: subscription
commitmentUsd: 899.0
priceUsd: 899.0
units: 200000000
usdPerMillionUnits: 4.5
supply: premium
fastShare: 0.2
live: true
- key: pack_l
label: Pack L
kind: pack
commitmentUsd: 200.0
priceUsd: 200.0
units: 32000000
usdPerMillionUnits: 6.25
supply: premium
fastShare: 0.0
live: true
- key: pro_monthly
label: Pro
kind: subscription
commitmentUsd: 99.0
priceUsd: 99.0
units: 15000000
usdPerMillionUnits: 6.6
supply: premium
fastShare: 0.3
live: true
- key: pack_m
label: Pack M
kind: pack
commitmentUsd: 50.0
priceUsd: 50.0
units: 7000000
usdPerMillionUnits: 7.14
supply: premium
fastShare: 0.0
live: true
- key: pack_s
label: Pack S
kind: pack
commitmentUsd: 10.0
priceUsd: 10.0
units: 1200000
usdPerMillionUnits: 8.33
supply: premium
fastShare: 0.0
live: true
- key: per_call
label: Per call (x402) / PAYG
kind: per_call
commitmentUsd: 0.0
priceUsd: 9.0
units: 1000000
usdPerMillionUnits: 9.0
supply: premium
fastShare: 1.0
live: true
- key: builder
label: Builder
kind: flat
commitmentUsd: 12.0
priceUsd: 12.0
units: 20000000
usdPerMillionUnits: 0.6
supply: public
fastShare: 0.0
live: true
- key: free
label: Free
kind: free
commitmentUsd: 0.0
priceUsd: 0.0
units: 1000000
usdPerMillionUnits: 0.0
supply: public
fastShare: 0.0
live: true
- key: door1
label: Anonymous key (door 1)
kind: free
commitmentUsd: 0.0
priceUsd: 0.0
units: 300000
usdPerMillionUnits: 0.0
supply: public
fastShare: 0.0
live: false
- key: founding
label: Founding (Pro locked 12 months; until 2026-12-05 or while seats last)
kind: subscription
commitmentUsd: 79.0
priceUsd: 79.0
units: 15000000
usdPerMillionUnits: 5.27
supply: premium
fastShare: 0.3
live: true