Stablecoin reserve attestations as JSON: reserves, composition, attestor, on-chain supply, ratio. $0.02 per call, free sample, no signup for the first call.
curl "https://agentwares-stablecoin.vercel.app/v1/reserves/USDC?sample=1" # free example curl -H "Authorization: Bearer $KEY" "https://agentwares-stablecoin.vercel.app/v1/reserves/USDC" # $0.02 curl "https://agentwares-stablecoin.vercel.app/v1/reserves/USDC" # 402 with x402 (USDC) terms
MCP (Streamable HTTP): https://agentwares-stablecoin.vercel.app/mcp · tools stablecoin_reserves, stablecoin_list_issuers · llms.txt · pricing.json · server.json · bazaar.json · issuers
No signup: POST /v1/keys returns an API key with a $0 balance and fund_url, the top-up route. POST it with the key and an amount for a Stripe Checkout URL — a card page a person completes, so an unattended agent passes it to its operator, funds in USDC over x402 instead, or uses free keyless sample mode. Once funded, send Authorization: Bearer <key> and each call comes off the balance. GET /v1/credits shows the balance and ledger; POST /v1/credits buys another pack ($10, $50, $200). Repeat a call with the same Idempotency-Key and it is charged once; a call that fails is refunded.
Paying in USDC over x402 on Base is live: an agent reads the 402, signs an EIP-3009 authorisation and is served, with no account and no human. The card rail is Stripe Checkout, completed by a person; every wallet response carries a notice saying whether card payments on this deployment are live or in Stripe test mode.
curl -X POST https://agentwares-stablecoin.vercel.app/v1/keys # a key with a $0 balance + fund_url curl -H "Authorization: Bearer $KEY" https://agentwares-stablecoin.vercel.app/v1/credits # balance and ledger
| Symbol | Issuer | Attestor | Cadence | Parsed | |
|---|---|---|---|---|---|
| USDT | Tether International, S.A. de C.V. | BDO Italia S.p.A. | quarterly | 2026-06 | source |
| USDC | Circle Internet Financial, LLC | Deloitte & Touche LLP | monthly | 2026-07 | source |
| EURC | Circle Internet Financial Europe SAS | Deloitte & Touche LLP | monthly | 2026-07 | source |
| USDS | Sky Protocol (formerly MakerDAO) | none (on-chain) | realtime | — | source |
| DAI | Sky Protocol (formerly MakerDAO) | none (on-chain) | realtime | — | source |
| FDUSD | FD121 Limited (First Digital Labs) | Prescient Assurance LLC | monthly | — | source |
| PYUSD | Paxos Trust Company, LLC | KPMG LLP | monthly | — | source |
| USDP | Paxos Trust Company, LLC | KPMG LLP | monthly | — | source |
| USDG | Paxos Digital Singapore Pte. Ltd. | KPMG LLP | monthly | — | source |
| USDe | Ethena Labs | Custodians (Copper, Ceffu, Anchorage Digital, Kraken) | monthly | — | source |
| USDtb | Anchorage Digital Bank N.A. | Big Four accounting firm (named in each report) | monthly | 2026-07 | source |
| TUSD | Techteryx Ltd. | Moore Hong Kong | daily | — | source |
| USDD | TRON DAO Reserve | none (on-chain) | weekly | — | source |
| GUSD | Gemini Trust Company, LLC | BPM LLP | monthly | — | source |
| frxUSD | Frax Finance | none (on-chain) | realtime | — | source |
| crvUSD | Curve Finance | none (on-chain) | realtime | — | source |
| GHO | Aave DAO | none (on-chain) | realtime | — | source |
| LUSD | Liquity Protocol | none (on-chain) | realtime | — | source |
| USD0 | Usual | none (on-chain) | realtime | — | source |
| USDY | Ondo USDY LLC | Ankura Trust Company (verification agent) | monthly | — | source |
| RLUSD | Standard Custody & Trust Company, LLC (Ripple) | Independent CPA (named in each report) | monthly | 2026-07 | source |
| USD1 | BitGo Trust Company (for World Liberty Financial) | KPMG LLP | monthly | 2026-07 | source |
| AUSD | Agora Finance | Grant Thornton LLP | monthly | — | source |
| XSGD | StraitsX Singapore Pte. Ltd. | ISCA-listed CPA firm (named in each report) | monthly | — | source |
| EURS | STSS (Malta) Limited | BDO Malta | quarterly | — | source |
| EURT | Tether International, S.A. de C.V. | BDO Italia S.p.A. | quarterly | — | source |
Informational only, not financial, investment or legal advice. Figures are parsed from the issuer's own published attestation (see source_url) and DefiLlama's public supply feed; the attestation date (as_of) and the on-chain supply date differ. Verify against the source document before relying on any number.