Fees

What each H-Series service charges, in one place. Fees are stablecoin micropayments settled on chain (x402); paid actions are final once confirmed. Discovery, showroom use, and most read paths are free; a service charges only for the priced actions listed below.

Service	What is charged	Price	Rails	Notes
H-Index Capability registry	Register a listing (one time); renew a listing (per year)	$10.00 register + $5.00 / year renew	USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)	Discovery and search are free. Re-registering a URL you already own is free; revoke is free.
H-Seal Execution proof	Anchor a receipt (POST /anchor)	$0.05 each	USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)	The request-envelope notary is free.
H-Grant Credential gating	Gated credential-release call (POST /call/{vaultId})	$0.05 each	USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)	Building and signing a grant policy is free; the fee is per release call.
H-Relay Transport	Send to an inbox (POST /send); relay / context proxy (POST /relay)	$0.05 each	USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)	Both priced surfaces are $0.05 per call.
H-Scope Wallet behavior scan	Scan an address (POST /scan)	$0.10 each	USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)	Scanning in the showroom is free; the fee is on the agent API.
H-Gate Egress control	Inspect an outbound payload (POST /inspect)	$0.10 each	USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)	Inspecting in the showroom is free; the fee is on the agent API.
H-Pact Membership rings	Create a ring (POST /rings)	$5.00 each	USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)	Admit, evict, policy, and retire are free; only ring creation is paid.
H-Cert Standing and delegation	Create a record: onboard a principal or link an account	$0.10 each	USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)	One-time per record, paid over x402. Directory and standing reads, resolve, revoke, and unlink are free; onboarding from the showroom is free.
H-Agent Agent runtime identity + capped spend	Take-rate on a third-party agent's merchant spend	3% (300 bps) + optional flat gas markup	USDC (Base)	Charged on top of the merchant price, not deducted from it. First-party estate apps (for example Budgie) are exempt.

H-Index

Capability registry

$10.00 register + $5.00 / year renew

Charged: Register a listing (one time); renew a listing (per year)
Rails: USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)
Notes: Discovery and search are free. Re-registering a URL you already own is free; revoke is free.

H-Seal

Execution proof

$0.05 each

Charged: Anchor a receipt (POST /anchor)
Rails: USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)
Notes: The request-envelope notary is free.

H-Grant

Credential gating

$0.05 each

Charged: Gated credential-release call (POST /call/{vaultId})
Rails: USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)
Notes: Building and signing a grant policy is free; the fee is per release call.

H-Relay

Transport

$0.05 each

Charged: Send to an inbox (POST /send); relay / context proxy (POST /relay)
Rails: USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)
Notes: Both priced surfaces are $0.05 per call.

H-Scope

Wallet behavior scan

$0.10 each

Charged: Scan an address (POST /scan)
Rails: USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)
Notes: Scanning in the showroom is free; the fee is on the agent API.

H-Gate

Egress control

$0.10 each

Charged: Inspect an outbound payload (POST /inspect)
Rails: USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)
Notes: Inspecting in the showroom is free; the fee is on the agent API.

H-Pact

Membership rings

$5.00 each

Charged: Create a ring (POST /rings)
Rails: USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)
Notes: Admit, evict, policy, and retire are free; only ring creation is paid.

H-Cert

Standing and delegation

$0.10 each

Charged: Create a record: onboard a principal or link an account
Rails: USDC (Hedera, Base, Solana, Stellar) + RLUSD (XRPL)
Notes: One-time per record, paid over x402. Directory and standing reads, resolve, revoke, and unlink are free; onboarding from the showroom is free.

H-Agent

Agent runtime identity + capped spend

3% (300 bps) + optional flat gas markup

Charged: Take-rate on a third-party agent's merchant spend
Rails: USDC (Base)
Notes: Charged on top of the merchant price, not deducted from it. First-party estate apps (for example Budgie) are exempt.

All rails are stablecoin: USDC on Hedera, Base, Solana, and Stellar, and RLUSD on XRPL. Prices are set in US cents and converted to each token's base units at payment time; the amount you pay tracks the cents figure above. H-Agent settles in USDC on Base.

H-Agent is priced differently from the rest. It charges a take-rate on a third-party agent's merchant spend, not a fixed per-call fee. That fee is added on top of the merchant price rather than deducted from it, and first-party estate apps (for example Budgie) are exempt. An optional flat gas markup may apply.

See the Terms of Service for payment finality. The canonical price source is the estate treasury manifest; the figures here mirror it.

Building an agent? The same schedule is machine-readable at /fees.json. Live per-service prices are also on each service's /config and in the x402 402 challenge.