flexyield.io

Get a FlexYield API key with no signup: public supply, 10,000 weighted units per UTC day, 5 requests/s, every tool.

Step 1 of binding the API key you are calling with to a wallet: returns the exact SIWE (EIP-4361) message that wallet must sign.

Step 2 of binding the API key you are calling with to a wallet: pass the wallet's signature over the message from bind_key_start.

Step 1 of claiming an agent by its EVM address for the account you are calling with: returns the exact SIWE message the agent's wallet must sign.

Step 2 of claiming an agent: verify the wallet's signature over the message from claim_agent_start and equip the agent with its own budgeted API key (default 50000 requests/month).

Create an additional API key on the account you are calling with (a name, optional monthly unit cap).

Configure one API key of your account by id: monthly_request_cap (a monthly unit budget; omitted = unchanged, 0 = remove the cap), enabled (the list of services it may use: rpc, data, gas, tx_status, ens, prices, contracts, utils) and caps ({service_key: units} per service).

Revoke one API key of your account by id; calls with that key stop working immediately and the key cannot be restored.

List the API keys of your account (scope='keys', default) or its agent fleet with wallet claims and budgets (scope='agents').

Billing state of your account: tier, whether payments are live, the subscription (plan, interval, price in USD cents, status, period end, cancel-at-period-end), the card on file (brand, last4, expiry — never the number), prepaid pack balances, any founding-price reservation and the soft-landing state.

Read or change the account-wide service settings: which gateway services (rpc, data, gas, tx_status, ens, prices, contracts, utils) are enabled and an optional monthly unit cap per service.

Update your account's preferences: notifications (notify_incidents, time_zone) and/or the insights that tailor the service (use_case, team_size, volume, region, previous_provider, referral_source, chains, wish_chains, wish_chain_other).

Send FlexYield an enterprise wishlist: what would need to be true for you to run on FlexYield (chains, SLAs, compliance, features, prices; max 1000 chars) plus a contact email; the founders reply by email.

Join the FlexYield early-access waitlist with an email and a qualifier (developer, investor or curious).

List FlexYield's public plans: price in integer USD cents, billing interval, monthly included units and burst rate limits, plus the enterprise line and the signup URL.

Your account's usage in one of three views.

Your account's statement for one billing period (default: the current one): invoice facts plus usage grouped by API key or agent, chain and method class — requests, weighted units, cache hits, refusals; period='list' enumerates the periods available.

Your support tickets with FlexYield.

Product feedback to FlexYield.

Native balance and ERC-20 token balances of an address on one chain (eth_mainnet, base_mainnet, arbitrum_one, optimism_mainnet, polygon_pos, solana_mainnet; tokens where a data-capable upstream exists).

Recent asset transfers (sent and received, newest first) of an address on one EVM chain with a data-capable upstream.

Prices.

Status of one transaction hash on any supported chain: confirmed, failed, pending or unknown, with confirmations and gas on EVM chains or slot and commitment on Solana.

ENS resolution on Ethereum mainnet: pass a name ('vitalik.

The verified ABI of a contract (with its name and match level) from Sourcify's open dataset on eth_mainnet, base_mainnet, arbitrum_one, optimism_mainnet or polygon_pos.

Decode a transaction's calldata against the target contract's verified ABI (Sourcify): the function signature, its selector and the argument values (static types decoded; dynamic types shown raw and labelled).

Offline EVM utilities, no chain call: op='checksum' (EIP-55 checksum and validity of input=address), op='convert' (unit conversion wei…gwei…eth: input=value, from=unit, to=unit), op='selector' (4-byte selector and topic0 of input=function signature) and op='keccak' (keccak256 of input text).

Verify a signature offline: mode='personal' checks an EIP-191 personal_sign signature (message, 65-byte 0x signature, optional expected address); mode='siwe' checks a SIWE / EIP-4361 message (the exact signed text plus signature — parses the fields, checks signature and expiry; domain and nonce policy stay with you).

The status overview of the API key you are calling with: its door (how it was obtained: public via get_key, wallet-bound, or adopted by a paying owner), its tier, the budgets left (month, day, prepaid packs), the fences (its limits) each with a doorway (the path past that limit: bind, adopt, buy a pack, or a ticket), your last-30-day volume priced on every lane (a lane = a price tier: cheap, balanced, fast), the break-even sentence (the volume at which a paid plan beats pay-per-call, for your owner), the account features and the other doors.

Quote one JSON-RPC call before making it: the weighted units it costs (standard 1, heavy 2, or not offered) and the USD per 1M units on every lane (a lane = a price tier: cheap, balanced, fast).

Explain a FlexYield error code (e.

A recommendation from our live measurements.

A compatibility report for switching your RPC provider to FlexYield: paste your current config as text (endpoint URLs, env lines, code) and get every endpoint mapped to our chain URL, every JSON-RPC method you name with its unit weight and limits, and the list of what changes (auth header, units instead of compute units, no overage, refusals as doorways, measured status).

Start the purchase of a prepaid unit pack (size 's': 1.

Send one JSON-RPC call through the FlexYield gateway — the same routing, failover, cache and meter as POST /rpc/{chain}.