agent-exec
Accountless pay-per-use sandbox, storage, locks, attestation, email inbox and DNS names via x402.
| Endpoint | https://agent-exec.448c.org/mcp (streamable-http) |
|---|---|
| Registry version | 0.4.0 |
| Now | 52 tools · grade D (55) · pin ts_8abe5c7a6b447ddd87e84872c0f56a92 · protocol 2025-06-18 |
| First / last listed | 2026-11-05 01:01 UTC / 2026-11-05 01:01 UTC |
| Grade over time | 2026-11-05: D (55), 52 tools |
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Tools: execute storage_buy storage_renew storage_replace storage_read storage_list storage_usage storage_delete claim_acquire claim_renew claim_acquire_free claim_read claim_release attest_create attest_read handoff_deposit handoff_read deadman_register deadman_confirm deadman_read listing_promote drift_check drift_venues drift_baseline watch_register watch_read check_address check_url pay_requirements pay_send pay_receipt create_inbox read_inbox inbox_status release_inbox dns_rent dns_renew dns_lookup dns_rent_free dns_set_records dns_release placement_order placement_venues placement_ready placement_status placement_cancel relay_usdc rpc_call x402_supported x402_verify service_card search_listings
execute | PAID: run code in an isolated, network-less sandbox and get stdout, stderr and exit code back. Call it once without payment to receive the price as an x402 PaymentRequired (Base USDC, and Solana USDC where offered); call it again with a signed payment in _meta['x402/payment'] to run. The receipt comes back in _meta['x402/payment-response']. No account, no API key. Complaints, questions, quote requ params: runtime*, source*, stdin, limits, files |
storage_buy | PAID: store opaque bytes for the life of the plan you buy, owned by the wallet that pays, readable with no account. Returns the object id and when it expires; read it back with storage_read, extend it with storage_renew. Call it once without payment to receive the price as an x402 PaymentRequired (Base USDC, and Solana USDC where offered); call it again with a signed payment in _meta['x402/payment params: plan*, contentBase64*, label |
storage_renew | PAID: push an object you own further out, by buying it another plan term. The object is untouched; only its expiry moves. Returns the new and previous expiry. Call it once without payment to receive the price as an x402 PaymentRequired (Base USDC, and Solana USDC where offered); call it again with a signed payment in _meta['x402/payment'] to complete it. The receipt comes back in _meta['x402/payme params: id*, plan* |
storage_replace | PAID: overwrite the contents of an object you own, keeping its id, and buy it a fresh plan term at the same time. Omit label to keep the current one, pass an empty string to clear it. Call it once without payment to receive the price as an x402 PaymentRequired (Base USDC, and Solana USDC where offered); call it again with a signed payment in _meta['x402/payment'] to complete it. The receipt comes params: id*, plan*, contentBase64*, label |
storage_read | FREE: read back an object you own, as base64. This is how what you bought with storage_buy comes back to you over MCP. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact message to sign, in both forms (EIP-191 for a 0x wallet, ed25519 as 'solana:<base58 pubkey>:<base58 sig>'). Complaints, questions, q params: id*, signature*, nonce*, signedAt* |
storage_list | FREE: list the objects your wallet owns -- id, label, size, when each was created and when it expires -- one page at a time. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact message to sign, in both forms (EIP-191 for a 0x wallet, ed25519 as 'solana:<base58 pubkey>:<base58 sig>'). Complaints, questi params: signature*, nonce*, signedAt*, after |
storage_usage | FREE: how many objects your wallet is storing and how many bytes they occupy. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact message to sign, in both forms (EIP-191 for a 0x wallet, ed25519 as 'solana:<base58 pubkey>:<base58 sig>'). Complaints, questions, quote requests, or a service you wish we h params: signature*, nonce*, signedAt* |
storage_delete | FREE: delete an object you own before it expires, and free its bytes. There is no refund and no undo. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact message to sign, in both forms (EIP-191 for a 0x wallet, ed25519 as 'solana:<base58 pubkey>:<base58 sig>'). Complaints, questions, quote requests, or params: id*, signature*, nonce*, signedAt* |
claim_acquire | PAID: atomically win a caller-named key for your own fleet -- an accountless compare-and-set. outcome "acquired" means you won it; outcome "held" is NOT an error, it means somebody already holds it and held.mine says whether that somebody is you -- the signal that stops a crash-resume or a duplicated retry doing an irreversible action twice. Keys are scoped to the PAYING WALLET: one payer's keys a params: key*, holder*, plan* |
claim_renew | PAID: extend a hold you already have without losing your place in line -- the heartbeat that lets a lease be SHORT (so a crash frees it fast) while a live holder keeps it alive by paying again. Re-acquiring with claim_acquire deliberately does NOT extend, so a retry loop cannot hold a key indefinitely by accident. Call it once without payment to receive the price as an x402 PaymentRequired (Base U params: key*, holder*, plan* |
claim_acquire_free | FREE: win a caller-named key for 300 seconds, or learn who already holds it. Unlimited distinct keys per wallet, renewable by calling again. A sibling of claim_acquire, not a discount on it: this lease is 12x shorter than the cheapest paid plan, so a lock that has to survive a deploy, a batch or a day is on the paid ladder from the first minute. The free-acquire signature has its OWN domain, disti params: key*, holder*, signature*, nonce*, signedAt* |
claim_read | FREE: who currently holds this key, if anyone -- scoped to YOUR wallet, so a stranger cannot probe your namespace. Checking your own lock must not cost again, or a fleet polling its own hold is charged for not doing work twice. A key nobody holds answers with claim: null, never a not-found: "is this free?" is a legitimate question with a legitimate negative answer. The read signature cannot releas params: key*, signature*, nonce*, signedAt* |
claim_release | FREE: give up a key you hold before it expires, so the next racer does not have to wait out your hold. Release signs its own domain-separated message, distinct from the read domain, so a captured inspect proof can never double as a lock-breaking order. The signature proves the WALLET and does not by itself authorize the release: holder is separate and unsigned, and the release is refused unless it params: key*, holder*, signature*, nonce*, signedAt* |
attest_create | PAID: we fetch a URL from OUR vantage point and return a signed, timestamped attestation of what we saw -- hash, byte count, HTTP status and headers, never the body itself. Read it back afterwards for free with attest_read, so the id can be cited to a THIRD PARTY who never paid us and who can verify the signature themselves. A fetch that fails to connect, times out, or is refused for safety is sti params: url* |
attest_read | FREE and unauthenticated: read a previously-created attestation back by id, with its signature. This is how what you bought with attest_create comes back over MCP -- and deliberately NOT wallet-scoped, because the whole point is that a third party who never paid can fetch it and check the signature. Complaints, questions, quote requests, or a service you wish we had: POST /feedback on this host -- params: id* |
handoff_deposit | PAID: deposit a typed briefing for the process that takes over from you -- what is DONE (every entry carrying evidence of how it was verified), what is NOT done, what was IN FLIGHT at the cut, and what to pick up FIRST. Returns an id; the successor reads it back for free with handoff_read, with no identity, header or payment of any kind, so neither side needs an account with us. Retained 3 days. T params: done*, notDone*, inFlight*, pickUpFirst* |
handoff_read | FREE and unauthenticated: read a briefing back by id. This is how what you bought with handoff_deposit reaches your successor over MCP. Deliberately needs no signature -- the successor is by construction a DIFFERENT process and may hold no wallet at all, so demanding proof of the payer would make the product undeliverable. Possession of the id is the entire authorisation; treat it as a secret. Com params: id* |
deadman_register | PAID: register an intent you are about to act on irreversibly, with a lease and a verification probe (a GET plus a predicate). Confirm before the lease expires with deadman_confirm, free -- otherwise, once the lease lapses, we run your probe and publish the verdict: confirmed-by-probe, refuted-by-probe, or unresolved (a first-class, honest outcome when the probe could not complete -- never guessed params: description*, leaseSeconds*, probe* |
deadman_confirm | FREE: the live caller closes the loop before the lease expires, so the probe never runs. Deliberately NOT wallet-scoped -- possession of the id is the entire authorisation, since the confirming call may have no wallet of its own. Refused, never a silent no-op, once the entry has left pending: confirming an already-resolved entry could otherwise overwrite a probe verdict with a claim from a caller params: id* |
deadman_read | FREE and unauthenticated: read an entry back by id, including its verdict and the raw probe response once resolved. This is how what you bought with deadman_register comes back over MCP. If the lease has lapsed and nobody has resolved it, the probe runs right here, synchronously, before answering -- each entry can trigger at most one live probe, ever. Complaints, questions, quote requests, or a se params: id* |
listing_promote | PAID: buy paid placement for a listing you own in this directory -- it ranks above free rows and reads tier "paid" for the life of the plan. Pay from the WALLET THAT OWNS the listing; no other proof is asked for and no other wallet can promote it. Promoting an already-promoted row EXTENDS it rather than replacing it, so renewing early never costs you the time you already paid for. Find the id, the params: id*, duration* |
drift_check | PAID: we re-fetch a venue we have snapshotted before, from OUR vantage point, and return what changed since the baseline -- the schema/rubric fields that moved, were added and were removed, not a byte diff. The answer to "did this venue quietly change its rules under me?" for an agent that cannot keep its own corpus. No drift is still an answer and is still billed: the comparison is what is sold. params: venue* |
drift_venues | FREE: every venue id drift_check can be aimed at, with what we hold for each. A closed value set, not a pattern: without it a caller can honour the input schema and still never name something buyable, which is a paywall on discovery rather than on work. Complaints, questions, quote requests, or a service you wish we had: POST /feedback on this host -- free, no account. Every report is read and ana params: none |
drift_baseline | FREE: the baseline snapshot we hold for one venue -- what a paid check would diff against, and when it was taken. Reading what you are about to buy a comparison against must not cost, or the first call is a blind one. Complaints, questions, quote requests, or a service you wish we had: POST /feedback on this host -- free, no account. Every report is read and analysed daily; there is no individual params: venue* |
watch_register | PAID: we poll a URL from OUR vantage point on your interval until your predicate matches or the ttl runs out, and keep the verdict for you to collect -- a wait that survives your own process dying, which is what an agent cannot do for itself. Price is a function of intervalSeconds x ttlSeconds (interval 60..86400s, ttl 60..604800s), so a first unpaid call quotes YOUR request rather than a fixed pl params: url*, intervalSeconds*, ttlSeconds*, predicate*, storageKey |
watch_read | FREE: the current state of a watch you registered -- active, matched or expired, with the observation that matched. The id is the capability, so a successor process handed the id can collect the verdict without your wallet. Reading never triggers a poll and is never charged: polling your own pending answer must not cost again. Complaints, questions, quote requests, or a service you wish we had: PO params: id* |
check_address | PAID: check an EVM address against public risk feeds (OFAC, community darklists, on-chain age) and get back a verdict, score and reasons in the same response the payment settles -- there is no separate read-back call. Charged only on success: if every risk feed is unreachable the request is refused for free (CHECK_SOURCES_UNAVAILABLE) rather than answered with an unsourced verdict. Call it once wi params: address*, chain |
check_url | PAID: check a URL against public risk feeds (phishing lists, domain age, lexical signals) and get back a verdict, score and reasons in the same response the payment settles -- there is no separate read-back call. Charged only on success: if every risk feed is unreachable the request is refused for free (CHECK_SOURCES_UNAVAILABLE) rather than answered with an unsourced verdict. Call it once without params: url* |
pay_requirements | FREE: ask a seller, unpaid, what it charges, and get back the accepts[] of its own 402 -- the exact PaymentRequirements you have to sign before pay_send can deliver anything. No payment is sent to the seller and none is taken from you. Every seller outcome answers: a 402 returns accepts[], a seller that wants no payment returns accepts null, and a seller that never answered says so. Complaints, qu params: sellerUrl*, method, headers, body |
pay_send | PAID: deliver an x402 authorization YOU signed to a seller exactly once, then read the chain for what actually became of it, and get back an immutable receipt of what the seller answered. Read the price to sign with pay_requirements first; we never sign on your behalf. A seller 402, 4xx, 5xx or refused connection is a delivered, billable answer -- what you buy is the truth about what the seller di params: sellerUrl*, method*, headers, body, authorization* |
pay_receipt | FREE and unauthenticated: read a pay_send receipt back by id -- what the seller answered, when, and what the chain says became of your authorization. Deliberately NOT wallet-scoped: the point is that the seller you are arguing with can fetch it without holding your wallet. Complaints, questions, quote requests, or a service you wish we had: POST /feedback on this host -- free, no account. Every re params: id* |
create_inbox | PAID: get a throwaway email address on a domain we own, live for 24 hours, to receive the verification mail a signup demands. RECEIVE ONLY -- nothing is ever sent from it, ever. Returns the address, the inbox id and when it expires; read what arrives with read_inbox, which is free and never charges again for a code you already paid for. Pay again passing the same id to extend that same address fro params: id |
read_inbox | FREE: the mail your inbox received, newest first, with any verification code and link already picked out -- from, to, subject, receivedAt, the plain text, codes[] and links[]. This is how what you bought with create_inbox comes back to you. Poll it with since to see only what arrived after a timestamp; reading never costs, however many times you poll. Ownership is proved by the paying wallet, with params: id*, signature*, nonce*, signedAt*, since |
inbox_status | FREE: the address, when it expires and how much mail is waiting in an inbox you own. Signed under its own domain, separate from the one read_inbox uses. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact message to sign, in both forms (EIP-191 for a 0x wallet, ed25519 as 'solana:<base58 pubkey>:<base5 params: id*, signature*, nonce*, signedAt* |
release_inbox | FREE: give up an inbox you own before it expires. Its messages go with it and the local part is never issued again; later mail to it is dropped, never bounced. There is no refund and no undo. Signed under its OWN domain, not the one the reads use. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact mes params: id*, signature*, nonce*, signedAt* |
dns_rent | PAID: rent <label>.448c.net for a year and point it where you say -- A, AAAA, CNAME and TXT records, so you can hold a TLS certificate by DNS-01 and pass domain-trust checks without a registrar account, a card or a human. The paying wallet owns the name. Returns the name, its owner and when it expires; repoint it with dns_set_records, extend it with dns_renew. Call it once without payment to recei params: label*, records* |
dns_renew | PAID: push a name you own further out by another year. What it resolves to is untouched; only its expiry moves, and a repeated payment extends it rather than resetting it. The payer must be the owner. Returns the new and previous expiry. Call it once without payment to receive the price as an x402 PaymentRequired (Base USDC, and Solana USDC where offered); call it again with a signed payment in _m params: name* |
dns_lookup | FREE: what we serve for a name under 448c.net -- its records, its owner and when it expires. No signature and no account: the zone is public, so reading it is too. Complaints, questions, quote requests, or a service you wish we had: POST /feedback on this host -- free, no account. Every report is read and analysed daily; there is no individual reply. params: name* |
dns_rent_free | FREE: one 24-hour name per wallet, so you can try the zone before paying -- the same label rules and records as dns_rent. Rent a year with dns_rent when it works. The message you sign commits to the literal subject `free`, not to the label. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact message to params: label*, records*, signature*, nonce*, signedAt* |
dns_set_records | FREE: replace the whole record set of a name you own -- never merged. The rental window is untouched: repointing a name you already paid for costs nothing. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact message to sign, in both forms (EIP-191 for a 0x wallet, ed25519 as 'solana:<base58 pubkey>:<ba params: name*, records*, signature*, nonce*, signedAt* |
dns_release | FREE: release a name you own before it expires. It stops resolving at once. There is no refund and no undo, and the label is free for anyone else to rent. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact message to sign, in both forms (EIP-191 for a 0x wallet, ed25519 as 'solana:<base58 pubkey>:<bas params: name*, signature*, nonce*, signedAt* |
placement_order | PAID: we submit your service to every permissionless agent venue we hold a submitter for -- 17 of the 33 on-behalf venues today -- and prove, per venue, that the entry is really in the catalogue. The rest stay `queued` on your order and are submitted the hour their submitter lands, for as long as the order is open: coverage only grows, never costs more. Venues that need a human (form, signup, capt params: url, id |
placement_venues | FREE: the lane table -- every agent venue we have evaluated, which of the 3 lanes a submission takes (on-behalf, owner-proof, human-only), the VENUE's own fee, the catalogue a landing is verified against, and for every dead one the reason it is dead. This is the list placement_order works from, published before you pay so you can decide whether it is worth anything to you. A dated snapshot of our params: lane, state |
placement_ready | FREE and honest: does your own service publish a document a venue can read (/.well-known/x402, an agent card)? If it publishes none, no amount of submission work can list you anywhere, and you should not pay us until it does. At most three outbound GETs; we read the status of each document, never the body. Complaints, questions, quote requests, or a service you wish we had: POST /feedback on this params: url* |
placement_status | FREE and owner-signed: every venue of your order with its state (queued, submitted, listed, human-only, unfunded, failed), the evidence a landing was verified by, when it was last checked and, where it is impossible, why. 'listed' is only ever written by a catalogue read that found your host. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the ref params: id*, signature*, nonce*, signedAt* |
placement_cancel | FREE and owner-signed: stop the weekly rechecks and drop the order. There is no refund for the remaining window, and entries already in a catalogue are the venue's to keep or drop -- we simply stop watching them. Ownership is proved by the paying wallet, with no account: send any placeholder signature once and the refusal returns details.expected -- the exact message to sign, in both forms (EIP-19 params: id*, signature*, nonce*, signedAt* |
relay_usdc | PAID: send USDC from a wallet that holds no ETH. You sign one EIP-3009 TransferWithAuthorization; we pay the Base gas, broadcast it and return the txHash. $0.0200 an order, ceiling 100000000 atomic USDC ($100). We never hold or need a key of yours -- we hold only the ETH that pays for the write. Every refusal (bad signature, closed window, value over the ceiling, self-send) is free and before the params: from*, to*, value*, validAfter*, validBefore*, nonce*, signature* |
rpc_call | PAID: one JSON-RPC call on base, base-sepolia, ethereum, solana for $0.0020. You name the chain and the method, NEVER an endpoint URL: we pick the node and absorb its IP rate limit, which is the whole product. No signup, no API key, no provider account, and no key of yours is held here. Chain reads, fee queries and raw-transaction broadcast only. You get the node's own JSON-RPC object back with YO params: chain*, method*, params, id |
x402_supported | FREE and unauthenticated: the x402 facilitator read contract -- {kinds:[{x402Version, scheme, network, extra?}]}, folded out of the same document GET /.well-known/x402.json serves, so it cannot claim a scheme or network this service does not take. This is the tool form of GET /supported on this host. No payment, no key, no RPC. Complaints, questions, quote requests, or a service you wish we had: P params: none |
x402_verify | FREE and unauthenticated: check an EVM `exact` x402 payment OFFLINE and get back {isValid, invalidReason?, payer?, message} -- EIP-712 signature recovery plus the same scheme/network/recipient/amount/validity-window checks this service runs on its own paid routes. It does NOT read the payer's on-chain balance or nonce (no chain connection here), so isValid is not a promise that settlement succeeds params: paymentPayload*, paymentRequirements*, x402Version |
service_card | FREE: what agent-exec sells, what it costs, and exactly where to pay for it. This tool call itself is free and moves no money. Code execution can be bought right here, with the paid execute tool (x402 over MCP), or over plain HTTP at the URLs this returns. Complaints, questions, quote requests, or a service you wish we had: POST /feedback on this host -- free, no account. Every report is read and params: none |
search_listings | FREE: unauthenticated search over agent-exec's directory of paid agent-facing services (same data as GET https://agent-exec.448c.org/listings). Returns a page of listings and an opaque cursor for the next page. params: tag, cursor, limit |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.