passlisted in Coinbase#2 by calls of 7 on this host
0.002 USDC
per call, as the listing declares it on solana:
- Validation state
- pass
- Uptime, 7 / 30 / 90 days
- 100% / 100% / 100%
- Calls, trailing 30 days
- 3
- Unique payers, trailing 30 days
- 1
- Last called
- 2026-08-31 15:53 UTC
- First observed by TOLLderived
- 2026-09-10
- Pricederived
- 0.002 USDC
- Networks
- 1
How big is this endpoint among the ones like it?
No trace is drawn of this endpoint’s own volume. Its counters have changed 1 time across 29 observations, and 3 changes are the fewest this site will draw a trace through, because two points and a guess are not a series. Every observation is in the JSON.
the-composer.fly.dev serves tx build, a POST endpoint that TOLL places in market data, listed in the Coinbase registry.
On Solana, tx build asks 0.002 USDC per call.
The request to tx build is a json body with the fields args, payer, accounts, programId and instruction.
A response from tx build, as declared, includes signers, transaction and resolvedAccounts.
tx build answered the sweep of 2026-09-15 with a valid 402, as at every sweep since 2026-09-11.
tx build shares the-composer.fly.dev with 6 other listed endpoints and is tied 2nd by calls with 3 others.
tx build takes 14% of the calls counted across the-composer.fly.dev.
One payer accounts for all 3 calls to tx build over 30 days.
tx build was last called 15 days before the snapshot.
Closest in price to tx build within market data: perp funding at agent402.tools and market risk at x402.ottoai.services.
tx build is priced above 10% of comparable listings in market data.
Across market data, 5,288 endpoints carry counters and tx build out-counts 60% of them.
The wallet paid by tx build is the payee of 7 endpoints on one host.
The price of tx build is declared by 277 other listings in market data too.
the payment options, as of 2026-09-15 21:20 UTC · method · pinnable
| registry | network | asset | amount | scheme | pay to |
|---|---|---|---|---|---|
| Coinbase | solana: | USDC | 0.002 USDC | exact | WzMaL78s…engqpb |
the checks, as of 2026-09-15 04:35 UTC · method · pinnableendpoint answered HTTP 402
No named check failed.
Every sweep that observed this endpoint, newest first.
| observed, UTC | state | failed checks | sweep |
|---|---|---|---|
| 2026-09-15 04:35 UTC | pass | 0 | daily-2026-09-15 |
| 2026-09-14 04:31 UTC | pass | 0 | daily-2026-09-14 |
| 2026-09-13 04:29 UTC | pass | 0 | daily-2026-09-13 |
| 2026-09-12 06:45 UTC | pass | 0 | daily-2026-09-12 |
| 2026-09-11 10:18 UTC | pass | 0 | daily-2026-09-11 |
Presence in a registry, not liveness of the service (method). Newest first.
- listed in Coinbase
From the registry record, not validated by TOLL.the declared schema, as of 2026-08-31 15:53 UTC · method · live
The input and output block
{
"input": {
"body": {
"args": {
"amount": "1000000",
"max_sol_cost": "100000"
},
"payer": "<base58 pubkey that will sign>",
"accounts": {
"mint": "<base58 pubkey>"
},
"programId": "6EF8rrecthR5Dkzon8Nwu78hRvfCKubJ14M5uBEwF6P",
"instruction": "buy"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"signers": [
"<pubkey>"
],
"transaction": "<base64 v0 tx>",
"resolvedAccounts": []
}
}
}Cite this page
The pinned URL below renders this page from the snapshot of 2026-09-15 21:20 UTC and does not change; the live page does, every six hours. Data reuse is under CC BY 4.0 (terms).
Plain text
TOLL, "tx build on the-composer.fly.dev", snapshot of 2026-09-15 21:20 UTC. https://tollindex.com/e/the-composer-fly-dev-tx-build-43c6e0/at/2026-09-15T21-20Z. Accessed [access date].
BibTeX
@misc{toll-e-the-composer-fly-dev-tx-build-43c6e0-2026-09-15T21-20Z,
author = {TOLL},
title = {tx build on the-composer.fly.dev},
howpublished = {\url{https://tollindex.com/e/the-composer-fly-dev-tx-build-43c6e0/at/2026-09-15T21-20Z}},
year = {2026},
month = {9},
note = {Pinned view of the snapshot of 2026-09-15 21:20 UTC. Accessed [access date].}
}None yet. Anything submitted through the form below is published here with its outcome.